PLEASE HELP ANSWER WITH LESS WORK. SHORT AND SWEET. LINUX COMMAND. GIVE DEFINITION IN SHORT WORD.

Variables:

PATH-

TERM

HOME

All variables (with their associated values) known to a command at execution time constitute its environment.

System Directories:

/tmp

/bin

/etc

/proc

/dev

Commands:

cat

less

more

tr

manual (man)

umask

umask -S

mv (used for renaming a file)

find

wc (option l)

ps ef

ls l

ls a

cut (options -c, and f)

make

open

touch

printf

grep

unless

chown

chgrp

chmod

rm

rmdir

fork

exec

Iterative data types (while, until, for, and foreach)

sort

$PWD

top

diff

who

date

awk { print $1 }

kill (The command kill sends the specified signal to the specified process or

process group)

cp

tail

head

ls i (used print the index number of each file)

ls l (use a long listing format)

telinit (change system runlevel)

ln (make links between files)

ln s (make symbolic links instead of hard links)

echo

Differences:

CLI (first generation) and GUI (second generation)

Physical (hard) and Symbolic (soft) link

WHAT DOES THOSE COMMANDS DO?

date | cut c1-10 > /tmp/save_date.txt

ls l | cut c5780 -> /tmp/process_names.txt

find ~dandrear type d -print

who | awk {print $1} | sort u | wc l ps -ef | awk '{print $2}' person=`who | grep $1`

grep ERR app.log >/tmp/errors.txt

ls l | wc I > /tmp/count