Friday 23 October 2020

20 commands that Linux system administrators should know

The commands featured in the article are: skills needed to be a server

curl --URL transfer command. Can also be used for endpoint connectivity and database connectivity testing

python -m json.tool / jq --JSON data formatting and manipulation tool

ls --List file and directory information

tail --Show the back of the file

cat --Show the contents of the file

grep --text search

ps-list process information

env --list environment variables

top --Monitor process information

netstat --Show network status

ip address --Displays network interface information and address information associated with the host (install the iproute2 package if it is not installed)

lsof --lists file information that the process is open

df --Show free disk space

du --Show file and directory capacity

id --Display user information

chmod --change permissions

dig / nslookup-using DNS

iptables-firewall control

sestatus --Check whether SELinux is enabled or disabled

history --Display command history

The article explains how to use the command in an easy-to-understand manner, including sample execution examples. Linux servers will be able to understand the contents of the system in detail by knowing how to use commands more deeply and more.

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