Essential Linux Command Line Utilities for System Administration
This guide provides a concise reference of essential Linux commands covering file and directory operations, system information gathering, service monitoring, text editing, SSH connectivity, firewall and network configuration, and basic scripting for automation.
File and directory operations:
• ls: List files and subdirectories in a directory.
• cd: Change current working directory.
• mkdir: Create a new directory.
• rm: Delete files or directories.
• cp: Copy files or directories.
• ab or httperf: Used for performance testing of web servers.
System information collection:
• dmesg: View system kernel messages.
• uname -r: Check operating system version.
Service monitoring:
• systemd or chkconfig: Manage system service status.
Text editing:
• vim or nano: Used for editing text files.
SSH connection:
• ssh: Establish a secure SSH connection.
Firewall and network configuration:
• iptables: Configure firewall rules.
• ifconfig or ip addr: View and configure network interfaces.
Script programming:
• bash, python or other scripting languages, used for automated testing and script writing.
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