Linux Commands : Basics

Linux_Commands_Shell_Scripting/LinuxCommands.md

@@ -1,14 +1,75 @@
 # Linux Commands
 
-## Ubuntu
+## Package Management
 
 ### ```apt-get```
 
 * ``` apt-get clean ``` - removes the downloaded .deb packages from cache in /var/cache/apt/archives/
 
-* ``` apt-get autoclean ``` - cleans the local repository of retrieved packages but only for the packages that you have uninstalled or those with no newer versions available.
+* ``` apt-get autqoclean ``` - cleans the local repository of retrieved packages but only for the packages that you have uninstalled or those with no newer versions available.
 
 * ``` apt-get autoremove ``` - removes the unneeded packages that were once installed as a dependency
 
+
+## Process Management
+
+### `killall`
+used to kill all process by name or command.
+
+### `pstree`
+Display a tree view of processes
+
+### `htop`
+It  is similar to top, but allows you to scroll vertically and horizon‐
+tally, and interact using a pointing device (mouse)
+
+## System Information
+### `uname`
+
+## User and Group Management
+
+### `useradd`
+
+### `userdel`
+
+### `usermod`
+
+### `passwd`
+
+### `id`
+
+### `groups`
+
+### `groupdel`
+
+### `groupadd`
+
+## Network Configuration and Monitoring
+
+### `netstat`
+
+### `ip`
+
+### `ss`
+Used to show "Socket Statistics" . 
+
+* `ss --summary` - To get a summary
+* `ss --process` - To get list process info like PID along listening ports etc
+
+### `traceroute`
+
+### `ssh`
+
+### `nc`
+
+## Misc
+
 ### ```printenv```
-* Displays all the environment variables delared
+* Displays all the environment variables delared
+
+
+## References
+* https://substack.com/@rockybhatia/note/c-79923887?r=40ln3j
+* Linux man pages
+* https://www.geeksforgeeks.org/ss-command-in-linux/
+* https://www.cyberciti.biz/faq/unix-linux-killall-command-examples-usage-syntax/