100

It will load the nfs module if all the modules upon which it depends have been loaded.

It displays the dependency resolution for the nfs module and loads all the modules upon which nfs depends before loading the nfs module.

It verifies that the nfs module and all other modules that depend on the nfs module are installed.

It displays the dependency resolution that would occur if the nfs module were to be loaded using modprobe nfs.

It only loads the nfs module if all the modules upon which it depends have not been loaded yet.

nis-tools

slapi-nis

ypbind

nisserv

nisbind

yp-tools

Anacron jobs are used to make sure cron jobs run if the system had been down when they were meant to run.

All crontabs are held in the /etc/cron.d directory.

Cron jobs may run as frequently as once a minute.

Anacron jobs may run as frequently as once a minute.

The crond daemon looks for jobs only in /etc/crontab.

DHCP is used to obtain a lease on an IP address.

The dhclient command may only be used to obtain a lease at boot time.

dhclient does not override the contents of /etc/resolv.conf.

DNS is not used to resolve host names for this adapter.

dhclient overrides the contents of /etc/resolv.conf.

The sysfs filesystem contains information about processes.

The proc filesystem contains information about CPUs.

The proc filesystem contains information about memory.

The sysfs filesystem contains information about CPUs.

The sysfs filesystem contains information about memory.

The proc filesystem contains information about the installer parameters.

The openssh-server package must not be installed.

The openssh package must be installed.

The sshd daemon must not be started.

The openssh-client package must be installed.

The ssh-agent must be started.

ssh keys must be generated by any user using the ssh client.

Set the LDAP Search Base DN and the LDAP server address and post in /etc/openldap/ldap.conf to: dc=example, dc = com ldap://ldap.example.com:389

Set LDAP Search Base DN and the LDAP server address and port in /etc/ldap.conf to: dc=example, dc=com ldap://ldap.example.com:389

Ensure that /etc/nsswitch.conf correctly references authentication priorities: passed: files ldap shadow: files ldap group: files ldap

Ensure that the LDAP server name can be resolved.

Ensure that DNS is used to resolve the LDAP server name.

visudo will never save the /etc/sudoers file if there are syntax errors in the file after editing.

visudo prompts for an action if there are syntax errors in the /etc/sudoers file after editing.

Using vi to edit /etc/sudoers opens the file read only.

Multiple administrators may edit the /etc/sudoers file simultaneously using visudo but only one may save the edited result.

Multiple administrators may edit the /etc/sudoers file simultaneously using vi but only one may save the edited result.

The vncserver service is shut down.

The vncserver service configuration is disabled only for those run levels for which it is currently enabled.

The vncserver service configuration is disabled for run levels 2, 3, 4 and 5.

The vncserver service remains in the same state it was in before the command was issued.

The vncserver service configuration is disabled for run levels 3 and 5 only.

Files in the harhest home directory are removed.

The home directory of harhest is removed.

Files owned by narhest in any directory are removed.

All directories owned by harhest are removed.

The /var/spool/mail/harhest mailbox is removed.

crontab /var/spool/cron/harhest is removed.

It supports named disk partitions.

It supports primary and extended partitions.

It supports disks greater than two terabytes.

It cannot be used on the system disk.

It supports only up to 16 partitions.

It is not possible to write to any file in the proc filesystem.

The /proc/cmdline file contains the parameters passed to the kernel.

Each process has a directory named for the process number in the proc filesystem.

The proc filesystem contains the same hardware information that is contained in the sys filesystem for backward compatibility.

Each process thread has a directory named for the process thread number in the proc files/stem.

GRUB stage1 must always load stage1_5.

GRUB stage1_5 is used to process the /boot/grub/grub.conf file.

GRUB stage1_5 loads GRUB stage2.

GRUB stage1 may load GRUB stage2 directly.

GRUB stage1 provides support for several different filesystems, enabling stage1 to load stage1_5.

GRUB stage1_5 provides support for several different filesystems, enabling stage1_5 to load stage2.

GRUB stage2 is used to process the /boot/grub/grub.conf file.

It may the used to raise the priority of existing processes.

It may be used to set the initial priority of a process.

A higher nice value makes a process run at a lower priority.

By default, a normal user can make a process run at a higher priority.

It may be used to lower the priority of existing processes.

By default, a directory is shared with no root squashed.

By default, a directory is shared read write.

By default, a directory is shared with root squashed.

By default, a directory is shared read only.

By default, a directory is shared sync.

Unattended installation is only possible if installing the Unbreakable Enterprise kernel.

The installation may be done from an NFS-mounted Image.

Unattended installation is only possible if installing the Red Hat-compatible kernel.

The installation may be done from a USB device.

The installation may be done in text or graphical mode.

TLS and ldaps should not both be selected.

To enable idaps, you must download the Certifying Authority (CA) Certificate.

To enable TLS, you must download the Certifying Authority (CA) Certificate.

The certificate is needed to verify ownership of the secret key used for encryption.

There is a command-line alternative to the Authentication Configuration Tool to enable the encrypted LDAP communication.

Agreeing to the license agreement

Registering for software updated

Creating a nonadministrative user

setting the current date and time to be synchronized with an NTP server

Configuring the dtrace facility

It is freely available to all Oracle Linux customers.

It contains additional packages not found on the installation media.

It contains only binary RPM packages.

It contains both source and binary RPM packages.

It is the only location to download errata.

All Unbreakable Linux subscribers are allowed to deploy a local YUM repository.

MDO is a stripped mirror RAID set.

MDO is a mirrored stripped RAID set.

If MD1 fails, so will MDO.

If MD2 fails, MDO too fails.

If /dev/sdd1 and /dev/sdg1 fail, MDO fails.

UPSTART logs State Changes to /vat/log/messages.

UPSTART logs job goals to /var/log/massages.

UPSTART logs only informational messages about warnings and errors to /var/log/messages.

UPSTART logs only informational messages about warnings to /var/log/messages.

UPSTART logs event emissions to /var/log/messages.

It relies on the LOCKD and RPC.STATD daemons to perform file locking.

It uses a single port (2049) for all client/server communications.

The UID and GID for a particular user must be the same on both client and server to avoid file ownership problems.

It has support for filesystem quotas.

RPC.IDMAPD is used to map a UID to its username and a GID to its group name and vice versa.

The RPM command can detect only direct package dependencies.

The RPM command can detect both direct and indirect package dependencies.

The YUM command can detect and resolve direct and indirect package dependencies.

The YUM command can detect and resolve indirect package dependencies only within the same repository.

The YUM command can only detect and resolve direct package dependencies.

A source RPM can have a dependency on a binary RPM.

Kernel boot parameters may be specified in /boot/grub/grub/conf.

Kernel boot parameters used to boot the running system may be examined after boot by Viewing /boot/grub/grub/conf.

Kernel boot parameters used to boot the running system may be examined after boot by viewing /proc/cmdline.

Additional kernel boot parameters may be specified in an administrator-specified parameter file that is read by grub stage.

Additional kernel boot parameters may be specified from the grub command line.

Additional kernel boot parameters may be specified in an administrator-specified parameters that is read by GRUB stage1_5.

Manual resizing of existing partitions on only a single device

Removal of all empty partitions only, leaving any Linux or non-Linux partitions unchanged

Replacing of existing Linux partitions only and leaving any other partitions unchanged

Replacing of existing non-Linux partitions only, and leaving any Linux partitions unchanged

Manual resizing of existing partitions on all selected devices

Removal of all existing partitions and creating new partitions to suit the install

The oracle account user on host FAROUT must issue an ssh-keygen command to generate public and private key files in the ~ oracle/.ssh directory FAROUT.

The oracle account user on the host WAYOUT must issue an ssh-keygen command to generate public and private key files in the ~/oracle.ssh directory on WAYOUT.

The Oracle account user on host FAROUT must add the contents of ~/oracle/.ssh/id_dsa.pub or ~/oracle/.ssh/is_rsa.pub file to the ~/oracle/.ssh/authorized_keys file on host WAYOUT.

The Oracle account user on host WAYOUT must add the contents of ~/oracle/.ddh/id_dsa or ~/oracle/.ssh/id_rsa.pub file to the ~/oracle/.ssh/authorized_keys file on host FAROUT.

The oracle account user on host WAYOUT must set the permissions on the ~/oracle/.ssh/authorized_keys file to 644.

The Oracle account user on host FAROUT must set the permissions in ~/oracle/.ssh/authorized_keys file 644.

The asmlib kernel module is included in the Red Hat-compatible kernel.

The asmlib kernel module is included in the Unbreakable Enterprise Kernel (UEK).

The asmlib kernel module must be installed separately when using the Unbreakable Enterprise Kernel (UEK).

The asmlib oracleasm-support package is installed as part of the Red Hat-compatible kernel package.

The asmlib oracleasm-support package is included as part of the Unbreakable Enterprise Kernel (UEK) package.

The asmlib oracleasm-support rpm must be installed separately when using the Unbreakable Enterprise Kernel (UEK).

The Oracle software owner must be a Linux user called oracle.

The Oracle software owner must not be the root user.

The owner of the Oracle httpd daemon process must be the Linux user called nobody.

A Linux user who is a member of the OSDBA group may start an Oracle database instance.

The /etc/sudoers file must specify that the Oracle software owner be allowed to run commands as root.

The OINSTALL group owns the Oracle Inventory.

Apache Web Server

Documentation

X Windowing system

Oracle Database Server 11g

Red Hat compatible kernel

Oracle WebLogic Server 11g

Create a ULN account if it doesn't exist already.

Ensure you have a valid Oracle Linux support agreement.

Install the uln_register.tgz package.

Install the uln_register.tgz and uln_register-gnome.tgz packages.

Run the uln_register command as the root user and answer the prompts.

Install the Unbreakable Enterprise kernel (UEK).

Run the yum update command.

Reboot your system.

The s* shell variable holds the exit status of the last command executed in the foreground.

The | | operator ensures that a command is run only if the command preceding the | | operator fails.

If test "SMYVAR" = prod and if ["SMYVAR" *= prod ] are equivalent ways to test the value of the MYVAR variable in a shell script.

If the first line of the script begins with #!/bin/sh, then the sh shell program is unable to interpret the script.

The bash shell supports more than 10 command-line arguments.

The && operator ensures that a command is run regardless of the outcome of the command that preceded the && operator.

Zip

Bzip2

Gzip

Xz

Cpio

ldd

dmesg

grep libselinux.so.1 /var/log/dmesg

strace

grep libselinux.so.1 /var/log/message

Oracle Database 11g Enterprise Edition single instance

Oracle WebLogic

Oracle Database Enterprise Edition Real Application Cluster

Oracle Enterprise Manager Cloud Control

Oracle Database 11g Standard Edition single instance

The default rule table is filter.

iptables has two main components: the kernel component netfilter and the command-line utility ipchains.

Input, output, and forward are the rule tables associated with filter.

PREROUTING, OUTPUT, and POSTROUTING are the chains associated with nat.

The main rule chains are filter, nat, and mangle.

The main rule tables are filter, nat, and mangle.

The pkill command kills a process by name.

A process killed with the default signal always terminates gracefully if it: does not block the kill request.

The kill command sends a sigkill (signal 9) by default to the process being killed.

The kill command may send a termination signal to more than one process at a time.

All signals may be blocked by a process.

All changes made using the grub editor at boot time are saved by default to /boot/grub/grub, conf.

Additional parameters may be passed to the selected kernel.

The initrd directive may not be changed.

Existing kernel parameters may be changed.

Some of the GRUB command-line functions may be password protected.

If a user jules is added with the useradd jules command, a group called jules_grp is also created

The umask for the jules user is 002 in /etc/bashrc

Users belonging to a group to which user jules also belongs, are automatically able to write to the private group belonging to the jules user.

If a user jules is added with the user add jules command, a group called jules is also added. but no other user may be a member of that group.

A directory owned by a group to which several users belong, and which has the setgid fa turned on, has shared write access to all members of the group.

The User private Group scheme is enabled by default in Oracle Linux.

Ensuring that /etc/pam.d/sshd includes: account sufficient pam_nologin.so

Create the /etc/nologin/login.deny file containing a single line +all

Creating the /etc/nologin.allow file containing a single line root

Creating the /etc/nologin file

Ensuring that /etc/pam.d/sshd includes: account requiredpam_nologin.so

LVM supports simple, striped, mirrored, and RAID-5 Logical Volumes (LVs).

A Physical Volume (PV) can be created on a disk or a disk partition.

A Physical Volume (PV) can only be created on a disk partition.

A Physical Volume (PV) can be resized.

A Volume Group (VB) can be split into multiple Volume Groups.

An LVM snapshot is read-only.

It contains kernel parameter files.

It contains metadata on all block devices.

It contains metadata on firmware.

It contains metadata on all loaded modules in the kernel.

It contains metadata on device classes.

It contains metadata on system uptime.

It supports labels.

By default, it can be used by an ordinary user to mount a local file system.

It lists all the currently mounted filesystems, if executed without any arguments

It lists only the filesystems listed in /etc/fstab if executed without any arguments.

Only root can mount filesystems that are not listed in listed in /etc/fstab.

It can be used to change the state of a service.

It can be used to specify the run levels for which a service is to be activated.

It can be used to list all services and their run levels-

It can be used to check the status of a service to see if it is running.

It can be used to add a service.

SCP always requires a passphrase to be used.

SCP permits copies between two remote hosts.

SFTP permits transfers between two remote hosts.

SSH may be used to execute a single command on a remote host instead of executing the login shell on the remote host.

SFTP may be used to execute a command on the remote server.

After installing logwatch, no configuration is required to produce reports from system logs.

After installing logwatch, the /usr/share/logwatch/dist.conf directory will not exist because it is optional.

After installing logwatch, you must create /etc/logwatch/conf to produce reports from system logs.

After installing logwatch, all the default directories continue to exist.

To produce a report from the previous day's logs, the - - range yesterday parameter must be specified.

Running /usr/sbin/logwatch produces a report of the previous day's log files.

The openssh-server package must be installed.

The sshd service must be started.

The openssh package must be installed.

The openssh-client package must not be installed.

The ssh-agent must be running.

Using the echo command to write values to specific files in the /sys directory

Issuing the sysct1 -w command to write values to specific files in the /proc/sys directory

Issuing the sysct1 -w command to write values to specific files in the /sys directory

Adding to or modifying parameters in /etc/sysct1.conf and issuing the sysct1 -p command

Using the echo command to write values to specific files in the /proc/sys directory

(hd0, 0) represents the first partition on device /dev/hd0.

The hiddenmenu directive hides the GRUB menu only for 5 seconds after which it becomes visible again.

The root directive specifies an initial root filesystem, allowing access to block device modules to mount the real root filesystem on disk.

(hd0, 0) represents the first partition on the first drive detected by the BIOS.

The initrd directive specifies the initamfs, an initial root filesystem in RAM, allowing access to block device modules to mount the real root filesystem.

Each kernel must have an initramfs that matches the version of the kernel.

Because there is an Unbreakable Enterprise Kernel installed, it must be the default kernel listed as shown by the default=0 directive.

Application-to-disk data integrity checking

Device naming persistence

Replaces udev for all files used by any application

Device ownership persistence

Multipathing driver for luns used for asmdisks

locking facility for using luns in an ASM cluster

Setting the hardware clock from the current system time

Setting the system time from the hardware clock

Displaying the current time in an administrator-specified format

Displaying the time and date in the future

Displaying the time and date in the past

Synchronizing the system time from an ntp server

when the integrity of the data is important

when you want to retransmit the dropped packages

when the connection with the other system is important

when you want to establish a connection with another system before sending data

SGID should be set on smith's home directory to let smith create files that belong to a group that is not his primary group.

The user smith can create a file that belongs to the apps group, only If his private group is the apps group as per /etc/group.

The user smith can use the newgrp command to change the primary group to apps, only if smith is listed in /etc/group as a member of the apps group.

The user smith can use the newgrp command to change the primary group to apps, but a password is required if smith is not listed in /etc/group as a member of the apps group.

/etc/cron.hourly

/etc/cron.daily

/etc/cron.minutely

/etc/cron.monthly

/etc/cron.yearly

/etc/cron.annually

The Linux Loader (LILO) bootloader may be chosen for installation.

The bootloader must be password protected and Anaconda prompts for a password in all cases.

The Grand Unified Bootloader (GRUB) is the only bootloader used by Oracle Linux.

If previously installed operating systems are found on disk partitions that were not overwritten, then an attempt is made to configure the bootloader to be able to boot them.

The bootloader is installed by default in the first partition of the disk.

set | grep service

echo $SERVICE

env | grep SERVICE

env $SERVICE

set $SERVICE

The expiration date of the breemar account

The number of days after the breemar account is locked, that it becomes expired

The maximum number of days that must elapse between password changes by the user breemar before the password becomes invalid

The number of days after the breemar account is locked, that it becomes unlocked

The minimum number of days that must elapse between password changes by the user breemar

The maximum number of failed login attempts on the breemar account before the account is locked

It contains Oracle Linux installation ISO images.

It contains Oracle Linux binary RPM packages.

It contains Oracle Linux errata packages.

It contains Oracle Linux source RPM packages.

It contains beta Oracle Linux software packages.

It does not contain Unbreakable Enterprise Kernel packages.

The system has Oracle Linux 6 installed and the Red Hat compatible kernel is running.

The system has Oracle Linux 6 installed and the Oracle Unbreakable Enterprise kernel Is running.

It is not possible to determine which kernel is running.

This system has been booted at least once, with the Red Hat-compatible kernel and once with the Unbreakable Enterprise kernel.

The oracle-release package contains both Oracle and Red Hat release metadata.

The iostat command runs at midnight of every day except Sunday.

The vmstat command runs twice per hour.

The vmstat command runs every other hour.

The vmstat command runs every second minute.

All cron job output is sent to the root user's mall.

All cron job output is sent to /var/log/messages.

The iostat command runs at midnight on the first day of each of the first five months of the year.

The files may contain options to be passed to a module only when it is a dependency of a module being inserted.

The file may contain shell commands to be run instead of inserting a particular module in the kernel.

The files may contain options to be passed to a module, only when it is inserted using a modprobe command.

The files may contain alias names for modules.

The file may contain instructions to ignore certain modules.

The files may contain options to be passed to a module only when it is Inserted using an insmod command.

The ssh-agent is used to hold private keys.

The ssh-add command may ask for a passphrase each time the same key is required by the same user in the same shell.

The ssh-agent is used to hold only public keys.

The ssh-add command asks for the passphrase only the first time a key is required by the same user in the same shell.

The ssh-add command retries the most recently saved passphrase if multiple key files are used.

iostat x

top

mpstat

vmstat

sar

An ext3 filesystem can be mounted as an ext2 filesystem.

An ext4 filesystem can be mounted as an ext3 filesystem.

The ext3 and ext4 filesystems both support multiple journaling modes.

The btrfs filesystem includes a volume manager.

The btrfs filesystem cannot be used for the root filesystem.

The ext4 filesystem is a copy-on-write filesystem.

It is a new name for oracle-validated package from Oracle Linux 5 that sets parameters to the same values.

It creates the oracle user if not already created, which owns the Grid Infrastructure software should that get installed.

It creates the grid user if not already created which owns the grid infrastructure software should that get installed.

It modifies kernel parameters in /etc/sysctl.conf.

It runs at the first boot after installing the packages to set a parameter indicating that is has run once.

It modifies parameters in the /etc/sysconfig/network-scripts directly.

It creates the osoper group, if not already created.

It can be performed using only network file system (NFS).

The Anaconda has to be made aware of the kickstart installation by passing the ks option at the boot: prompt.

By default, the kickstart installation sets the same root password if all the systems are set up using the same kickstart file.

Omitting any required item during the kickstart file creation would cause the item to be skipped during the kickstart installation without requiring any user intervention.

gdm

kdm

twm

xdm

arp

dig

mtr

ping -b

nslookup

nmap -sP

arping -D

Use the date command to adjust the system clock.

Use the rdate command to adjust the hardware clock.

Use the ntpdate command to adjust the system clock.

Use the hwclock command to change the hardware clock time.

when you want to boot from a network

when there is a need for a serial console

when you want to have a dual boot on the system

when you want the support for journaling file system

when you want to boot the system by just passing the kernel and the initrd files path at the boot prompt

The root filesystem / can be installed on a Logical Volume.

The LVM does not have built-in support for striping and mirroring.

Two Volume Groups can be merged together to form a single Volume Group.

The Logical Volumes can be extended without even unmounting the filesystems.

Physical Volumes can be added as well as removed from an existing Volume Group.

If only the /etc/at.deny file exists, all users are denied from using at, except the root user.

If /etc/at.allow and /etc/at.deny files do not exist, all users are permitted to use at.

If /etc/at.allow and /etc/at.deny files do not exist, only the root user is permitted to use at.

If only the /etc/at.allow file exists, only the users whose names are listed in the /etc/at.allow file are allowed to use at.

If /etc/at.allow and /etc/at.deny files exist, only the users whose names are listed in /etc/at.allow would be allowed to use at.

The network file system (NFS) service would not let station1 to write on the /export/setup share.

The NFS service would grant all other machines read and write access without squashing the root privileges except station1.

The NFS protocol on the server requires that requests from station1 should originate on an internet port greater than port 1024.

The NFS protocol on the server would reply to requests from station1 only after any changes made by that request have been committed to stable storage (/export/setup).

Only targeted network daemons are protected.

Separate types are defined for most commands and services.

Full SELinux protection would be applicable for all the daemons and applications.

Applications that do not have any policy defined would run in the unconfined_t domain.

Applications that do not have any policy defined would be denied access to the rest of the system.

It sets up the system clock.

It configures kernel parameters.

It does not configure swap space.

It is read before the /etc/inittab file by init.

It saves dmesg content to the /var/log/dmesg file.

Multiple X servers can be run on the same host.

The first X server on a remote host listens on port 6000.

The first X server on a remote host listens on port 6001.

Only a single X server can run on a machine at any given point of time.

executing the shell script using an alias created with the alias dailyrun='bash dailyrun.sh'

executing the shell script using an alias created with the alias dailyrun=dailyrun.sh

executing the shell script from the shell prompt using the bash command

executing the shell script from the shell prompt using the sh command

executing the shell script from within a shell function using an alias created with the alias dailyrun='dailyrun.sh'

The /etc/ssh/ssh_config file is the global configuration file for the sshd server daemon

If user harhest has an ssh configuration file called /home/harhest/.ssh/config, then this overrides the /etc/ssh/ssh_config file for OpenSSH sessions used by harhest

Copying the /harhest/.ssh/known_hosts file from user harhest on hosta to the /jopam/.ssh/known_hosts file for user jopam on hostb, permits harhest to use OpenSSH commands to access the jopam account without supplying a password

An ssh client uses either id_dsa.pub or id_rsa.pub to authenticate itself without a password, to an ssh server, which checks them into the target users' authorized_keys file

downgrading an installed system

booting an installed system from a local drive

attempting a rescue to repair problems with a partition table that prevents booting an installed system

deinstalling an installed system

upgrading an installed system

dsa keys must be protected by a passphrase

dsa keys are supported by version 2 of the ssh protocol

rsa keys are supported by version 2 of the ssh protocol

rsa keys are supported by version 1 of the ssh protocol

dsa keys are supported by version 1 of the ssh protocol

rsa keys must be protected by a passphrase

Install the system using text mode

Press the tab key and enter askmethod to allow a choice of video drivers to be listed

Specify the screen resolution at the Anaconda boot prompt

Install the system using a different X server

Install the system with the basic video driver option

It does not support disks with more than 1024 cylinders

It can be used on the boot disk

It supports either four primary partitions or three primary partitions and one extended partition

It can be used on disks up to four terabytes in size

It supports named partitions

They are only available to Oracle Premium Support customers

They contain a number of other RPMS that are required for a successful Oracle database product installation

They have dependencies on a number of other RPMS that are required for a successful Oracle database product installation

The oracle-validated RPMS if used, must be installed before installing an Oracle database product

The oracle-validated RPMS if used, must be installed after installing an Oracle database product

The number of HugePages is defined in /etc/security/limits.conf

The number of HugePages is controlled by a Linux kernel parameter

HugePages are never swapped to disk

HugePages usage reduces page table overhead

The number of HugePages is controlled by Oracle database parameters

RAID devices can only be built on disk partitions

It can be configured to have spare devices

It supports striping, mirroring, and a combination of striping and mirroring

It includes snapshot functionality

It can be used to mirror the root filesystem

template

$ModLoad

$template

$Load

ModLoad

An RPM can be installed from a local filesystem or a remote repository using the rpm command

In general, it is possible to have multiple versions of the same RPM package installed on a single system

a source RPM is machine architecture dependent

a binary RPM contains compiled programs as well as the source code of these programs

a RPM package can contain programs, documentation installation procedures, source files, and metadata about itself

A user may use su to start a new shell

The /etc/sudoers file may be edited to permit certain executables to be used with root privileges only if they are run on certain hosts

Using su-test to switch to the test user does not run the test user's login scripts

The /etc/sudoers file may be edited to prevent a user from using su to switch to another user

The /etc/sudoers file may be edited to allow a use to execute certain root-owned executables with root privileges