Retype the command, and be sure you type the filename correctly, letter by letter

Retype the command, but press the Tab Key after typing a few letters of the long filename to ensure that the filename is entered correctly

Press the Up arrow key, and use bash's editing features to correct the typo.

Any of the above

None of the above

head -b file1

head --bottom file1

head -v file1

tail file1

tail -n 1 file1

The first four columns in the text are written to new files glaa, glab, glac, and glad

The first four columns in the text are written to new files aagl, abgl, acgl and adgl.

The lines of guest_list are evenly divided among new files glaa, glab, glac, and glad

The lines of guest_list are evenly divided among new files glaa, glab and glac.

The lines of guest_list are evenly divided among new files aagl, abgl, acgl and adg

grep

egrep

wc

tr

pr

xd

hd

od

Xd

dump

ifconfig < file.txt

ifconfig >> file.txt

ifconfig > file.txt

ifconfig | file.txt

ifconfig 2> file.txt

Standard error to myprog is taken from input.txt

Standard input to myprog is taken from input.txt

Standard output and standard error from myprog are written to input.txt

All of the above

None of the above

2

3

4

16

>16

grep change[ds] world.txt

sed change[d-s] world.txt

od "change'd|s" world.txt

cat world.txt changes changed

find world.txt "change(d|s)"

d.g

d[ou]g

d[o-u]g

di*g

d.ig

.bash_history

.bash_histfile

.history

.bashrc_history

.history_bash

2>&1 >filename

>filename 2>&1

1>&2>filename

>>filename

1&2>filename

BASHEXEC

BASHRC

PATH

EXECPATH

PATHRC

cat < myapp | cat > file1.log

myapp 0>&1 | cat > file1.log

myapp | cat > file1.log

myapp | tee file1.log

tee myapp file1.log

sed '/bob/Bob' letter > newletter

sed s/bob/Bob letter > newletter

sed 's/bob/Bob' letter > newletter

sed 's/bob/Bob/g' letter > newletter

sed 's/bob, Bob/'' letter > newletter

column -s : 1,7 /etc/passwd

chop -c 1,7 /etc/passwd

colrm 1,7 /etc/passwd

cut -d: -f1,7 /etc/passwd

The stdout from the command foo is appended to the file bar.

The stdout from the command foo overwrites the file bar.

The command foo receives its stdin from the file bar.

The command foo receives its stdin from the stdout of the command bar.

The stderr from the command foo is saved to the file bar.

cat

less

tee

sed

echo

verbose | quit

verbose &> /dev/null

verbose 2> /dev/null

verbose > junk.txt

quiet-mode verbose

sed -s "dog" "mutt" animals.txt

grep -s "dog || mutt" animals.txt

sed 's/dog/mutt/g' animals.txt

cat animals.txt | grep -c "dog" "mutt"

fmt animals.txt | cut 'dog' > 'mutt'