cat
chmod
clear
cp
gzip
kill
ls
mv
pwd
rm
rm -r
touch
history
history -c
find
rmdir
mkdir

sudo shutdown -P

# shutdown
# shutdown now
# shutdown 13:20  
# shutdown -p now	#poweroff the machine
# shutdown -H now	#halt the machine		
# shutdown -r09:35	#reboot the machine at 09:35am
# shutdown -c  #cancel a pending shutdown

# halt		   #halt the machine
# halt -p	   #poweroff the machine
# halt --reboot    #reboot the machine

# poweroff   	       #poweroff the machine
# poweroff --halt      #halt the machine
# poweroff --reboot    #reboot the machine

# reboot            #reboot the machine
# reboot --halt     #halt the machine
# reboot -p   	    #poweroff the machine