man CMD
echo <STR>
pwd
date
clear
sleep <N>
cal
man CMD
history
passwd
seq
exit
CTRL-L
mkdir
cd
rmdir
touch
ln
ls
tree
cp
mv
rm
un‐
link
rm
du
df
mkdir -m
<MODE>
0
---
1
--x
2
-w-
3
-wx
4
r--
5
r-x
6
rw-
7
rwx
chmod
umask
chmod
chown
chgrp
ls
ls -l
stat
id
groups
useradd
adduser
usermod
userdel
groupadd
groupmod
useradd
groupdel
cat
tac
cat
rev
nl
cat
head
tail
less
more
od
wc
spacebar
b
q
less
cut
paste
split
join
sort
uniq
diff
column
comm
cmp
fork()
init
root
exec()
init
init
ps
jobs
bg
^Z
fg
kill
kil‐
kill
lall
nohup
dis‐
nohup
disown
own
top
^C
free
crontab
at
atq
atrm
at
at
tr
grep
egrep
grep -E
fgrep
grep F
sed
awk
zip
.zip
zip
unzip
zip‐
info
gzip
gunzip
tar
gzip
gzcat
.gz
zgrep
grep
zegrep
egrep
.gz
grep -ZE
zfgrep
fgrep
.gz
grep -ZE
zip‐
grep
ssh
scp
sftp
rsync
bc
dc
alias
unalias
uname
which
whatis
whereis
users
who
grep
.gz
.zip
grep -Z
uptime
find
xargs