Top 25 Linux Commands I Use Weekly

A practical list of Linux commands I personally use most often during system monitoring, server administration, scripting, and troubleshooting. Use this list as a quick reference or jump-off point for deeper Linux command mastery. 

 

 🔧 System Monitoring & Info 

 Shows real-time process activity, CPU usage, memory, and system load. 

 top 

 Interactive version of top with easier navigation and color-coded output. 

 htop 

 Displays RAM usage with human-readable units. 

 free -h 

 Shows disk usage by mounted partitions in human-readable format. 

 df -h 

 Shows size of each item in the current directory. 

 du -sh * 

 Displays how long the system has been up and the current load. 

 uptime 

 Prints kernel version and system info. 

 uname -a 

 Displays the current user name. 

 whoami 

 

 🔍 Networking & Firewall 

 Displays network interfaces and IPs. 

 ip a 

 Shows the routing table. 

 ip r 

 Shows UFW rules with index numbers for deletion. 

 sudo ufw status numbered 

 Allows incoming SSH connections via UFW. 

 sudo ufw allow 22/tcp 

 Lists all listening ports (older tool). 

 sudo netstat -tuln 

 Modern alternative to netstat for listing open ports. 

 ss -tuln 

 Tests network connectivity with ICMP packets. 

 ping 1.1.1.1 

 

 📁 File & Directory Management 

 Lists files including hidden files and sizes. 

 ls -lah 

 Changes the current directory. 

 cd /path/to/directory 

 Copies a file or folder. 

 cp source destination 

 Renames or moves a file or folder. 

 mv oldname newname 

 Removes a directory and all its contents (⚠️ dangerous). 

 rm -rf /path/to/folder 

 Edits files using a simple terminal-based editor. 

 nano filename.txt 

 Displays contents of a file. 

 cat filename.txt 

 Follows a log file in real time. 

 sudo tail -f /var/log/syslog 

 

 ⚙️ Package Management (Debian/Ubuntu) 

 Updates package list and installs available upgrades. 

 sudo apt update && sudo apt upgrade -y 

 Installs a new package by name. 

 sudo apt install packagename 

 Searches installed packages for a string. 

 dpkg -l | grep keyword