Practical building blocks for safer and more maintainable Bash scripts.

A beginner-friendly Bash overview with basic commands, variables and a simple script.

unix2dos converts a Unix/Linux text file to Windows-style line endings. It is mainly useful when a file needs to be opened by older Windows tools that expect CRLF line endings. Convert a file This updates the file in place. Make a copy first if you need to keep the original Unix-format file. For shell scripts … Read more

mii-tool is an older Linux command used to check the link status and speed of some Ethernet interfaces. On modern systems, ethtool is usually preferred, but mii-tool may still appear on older servers. Check an interface The output can show whether the link is up and what speed or duplex mode is detected. Modern alternative … Read more

If you need a long-running shell session to survive an SSH disconnect, use a terminal multiplexer such as screen or tmux. Both let you detach from a session and reconnect later. Using screen screen -S work Detach with Ctrl-A then D. Reattach later with: screen -r work Using tmux tmux new -s work Detach with … Read more

How to open and search Linux man pages from the command line.