man

ls tree pwd mkdir rmdir cd

touch cp mv rm in find rename

cat more less head tac head tail cut paste sort uniq wc iconv dos2unix file diff tree chattr

isattr rev vimdiff

gzip tar unzip

uname hostname dmesg uptime file stat du df top free w date

find which whereis iocate

useradd userdel passwd chage usermod id su sudo visudo  roupadd

telnet ssh scp wget ping route ifconfig ifup ifdown netstat

rout mail mutt nslookup dig wget

mount umount df du fsck dd

shutdown reboot ps top kill date

top free vmstat iostat sar kill chkconfig last

paddwd su sudo umask chagrp chmod chown chattr isattr ps  whoami

w who users last lastlog fingers

ethool mii-tool dmidecode dmesg lspci

chkconfig echo yum watch alias unallias date clear history eject

time nohup nc xargs

top free vmstat mpstat iostat sar

top vmstat mpstat iostat sar

vmstat mpstat iostat sar

ipcs ipcrm

uptime

shutdown -h now

shutdown -h +1

init 0

halt

halt -p

poweroff

reboot shutdown -r now

shutdown -r +1

init 6

logout

exit

ctl +d

bg  fg  jobs kill killall pkill  crontab ps pstree

top nice nohup pgrep strace ltrace vmstat

mv rm dd fdisk parted

grep egrep sed awk