who
- Login name of user
- Date and time of login
- remote host name of user
whoami
- Display system's username
id
- Displays user identification (real and effective group ids)
groups
- Displays the groups for which user belongs
Ways to become sudo user in Linus OS
- sudo -i
- sudo -s
- sudo su -
- su -root
- su -
users
- Displays username of all users currently logged in
clear
lastlog
- detail of recent logged in user
File and Directory commands:
pwd
- present working directory
ls
- list directories
mkdir
- create directory
rmdir
- remove directory
-p : refers for parent
-v : verbose output for the processed direct
touch
- create file
/ root diretory
~ home directory
Installing packages
yum install package_name
Info about package
yum info package_name
Remove package
yum remove package_name
Installing package from a localfile
./filename
Disk usage command
du pathofdirectory
- find out disk usage summary
du -h pathofdirectory
- bring info in human readable format
du -sh nameofdirectory
- find out total disk usage
ah -sh nameofdirectory
System and hardware information
uname -a
- all user
uname -s
- know kernel name
uname -r
- release of kernel
uname -m
- print architecture
uname -o
- print operating system name
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