Linux - Helpful commands
Table of Contents
TODO
- https://www.redhat.com/en/blog/linux-system-info-commands
- https://www.redhat.com/en/blog/one-line-linux-commands
- https://www.redhat.com/en/blog/linux-commands-to-know
Refresh config files
Refresh .profile
source $HOME/.profile
. ~/.profile
Refresh .bash_profile
source $HOME/.bash_profile
. ~/.bash_profile
OS information
Type any one of the following command to find os name and version in Linux
cat /etc/os-release
lsb_release -a
hostnamectl
System information
To figure out if your computer has 64 bit or 32 bit processor :
uname -a
lscpu (look at the architecture row)
System commands
| command | description |
|---|---|
| systemctl -help | |
| systemctl suspend | command to put the system in sleep/suspend mode |
| systemctl hibernate | command to put the system in hibernate mode |
| reboot | command to reboot from terminal |
| systemctl list-units | List units currently in memory |
View ip address of the computer
Command to view ip address: hostname -I
list commands
| command | description |
|---|---|
| ls ltra | command to show all files and folders including hidden ones |
| ls –all | command to show all files and folders including hidden ones |
| ls -ltaX | |
| ls -l –block-size=M | (round file sizes to the nearest MB) To make `ls` show file sizes in megabytes |
| ls -l –block-size=MB | To make `ls` show file sizes in megabytes |
| ls -l –block-size=K | To make `ls` show file sizes in kilobytes |
Installing tar files
command to install a tar file in linux : how to use sudo command to install .tar.gz : Open a console, and go to the directory where the file is
tar -zxvf file.tar.gz
Toggle full screen : F11
E212: Can't open file for writing
Vim has a builtin help system. You might want to edit the file as a superuser as sudo vim FILE