friends here are all important linux commands that are useful they are basic as well as advanced commands
awk/nawk [options] file
cat [options] file
cd [directory]
chgrp [options] group file
chmod [options] file
chown [options] owner file
chsh (passwd -e/-s) username login_shell
cmp [options] file1 file2
compres [ options] file
cp [options] file1 file2
cut [options] [files]
date [options]
dd [if=infile] [of=outfile] [operand=value]
diff [options] file1 file2
df [options] [resource]
du [options] [directory or file]
echo [text string]
ed or ex [options] files
emacs [options] files
expr arguments
file [options] files
find directory [options] [actions]
finger [options] user [@hostname]
ftp [options] host
grep [options] 'search string' arguments/
egrep [options] 'search string' arguments/
fgrep [options] 'search string' arguments/
gzip [options] file/
gunzip [options] file/
zcat [options] file
head [-number] file
hostname
kill [options]
[-SIGNAL]
[pid#] [%job]
in [options] source _file target
lpq [options]/
lpstat [options]
lpr [options] file/
lp [options] file
lprm [options]
cancel [options]
ls [options] [directory or file]
mail [options] [user]
mailx [options] [user]
Mail [options] [user]
man [options] command
mkdir [options] directory
more [options] file
less [options] file
pg [options] file
mv [options] file1 file2
od [options] file
passwd [options]
paste [options] file
pr [options] file
ps [options]
pwd
rcp [options] hostname
rlogin [options] hostname
rm [options] file
rmdir [options]directory
rsh [options] hostname
script file
sed [options] file
sort [options] file
source file . file
sttrings [options] file
stty [options]
tail [options] file
tar key [options] [files]
tee [options] file
telnet [host [port]]
touch [options] [date] file
tr [options] string1 string 2
uncompress file .Z
uniq [options] file
uudecode [file]
vi [options] file
wc [options] [files]
whereis [options] command
which command
who or w
zcat file.Z
