Category: Linux
Linux cmp Command: Compare Files Byte by Byte
Learn how Linux cmp compares two files byte by byte, reports the first mismatch, runs silently in scripts, limits ranges, and differs from diff and checksums.
Linux Administration Memo: Essential Commands and System Checks
A compact Linux administration reference for checking system information, processes, storage, networking, users, permissions, services, and logs.
Linux uptime Command: Check Uptime and Load Averages
Learn how to use the Linux uptime command to check how long the system has been running and interpret load averages, with essential options, practical examples, output interpretation, and common troubleshooting tips.
Linux tail Command: View the End of a File and Follow Logs
Learn how to use the Linux tail command to view the last lines of a file and follow log updates in real time, with essential options, practical examples, output interpretation, and common troubleshooting tips.
Linux su Command: Switch User Accounts and Login Shells
Learn how to use the Linux su command to switch user accounts and start login or non-login shells, with essential options, practical examples, output interpretation, and common troubleshooting tips.
Linux nohup Command: Keep a Command Running After Logout
Learn how to use the Linux nohup command to keep a command running after the terminal closes or the user logs out, with essential options, practical examples, output interpretation, and common troubleshooting tips.
Linux sudo Command: Run Commands with Elevated or Another User's Privileges
Learn how to use the Linux sudo command to run approved commands with elevated privileges or as another user, with essential options, practical examples, output interpretation, and common troubleshooting tips.
Linux history Command: Review and Reuse Shell Command History
Learn how to use the Linux history command to review, search, reuse, and manage shell command history, with essential options, practical examples, output interpretation, and common troubleshooting tips.
Linux grep Command: Search Text and Filter Command Output
Learn how to use the Linux grep command to search files for text or regular expressions and filter command output, with essential options, practical examples, output interpretation, and common troubleshooting tips.
Linux free Command: Check Memory and Swap Usage
Learn how to use the Linux free command to inspect available memory, used memory, cache, and swap usage, with essential options, practical examples, output interpretation, and common troubleshooting tips.