system commands
uname : used to get type of OS
uname -r : used to get kernel version of our OS
uname -a : used to get full info about OS
clear: this command is used to clear the clear (or) you can use ctrl + l as a short cut
uptime : used to get since how long our system is in running state
uptime -p : this will give only time
hostname: used to get private dns name of our system
hostname -i : used to get private ip of our system
hostnamectl set-hostname “swiggy” : used to change hostname
ip addr : used to get private IP
ip route : used to get private IP
ifconfig : used to get private IP
date : to get todays date
timedatectl : used to get timezones
timedatectl set-timezone Asia/Kolkata : used to change Timezone to IST
who : used to see how many users have been loggin into your system
whoami : used to see the current user.
ps : used to see the running processors in system
kill -9 PID : used to kill a processor
date : Shows system date and timestamp
date +”%d” : Prints day of the month (01-31)
date +”%m” : Prints the month of the year 01-12
date +”%y” : Prints only the last two digits of Year
date +”%H” : Prints the hour 00-23
date +”%M” : Prints the Minute of the hour 00-59
date +”%S” : Prints the current seconds count in the minute (00-60)
date +"%D" : Prints Date in MM/DD/YY
date +”%F” : Prints only the Full date as YYYY-MM-DD
date +”%A” : Prints the Day of the Week Saturday-Sunday
date +”%B” : Prints the month between January-December