Snippet Collections

This code finds all `.txt` files in the current directory and its subdirectories using the `find` command, then deletes them using the `-exec` option with `rm`. This demonstrates how to use `find` and `-exec` to perform actions on matched files.

This snippet uses `envsubst` to substitute environment variables in the `/nginx.conf.template` file and outputs the result to `/etc/nginx/nginx.conf`. This demonstrates how to dynamically generate configuration files using environment variables.

This code reads the `~/.bashrc` file, removes lines that are comments (starting with `#`) or empty lines, and prints the remaining content. It demonstrates using stream pipes (`|`) and `grep` for filtering and processing text.

Send a `HUP` signal to the `prometheus` process to restart it. This uses `pidof` to get the process ID of `prometheus` and sends the signal to it. This demonstrates how to restart a process using the `HUP` signal.

List files and directories in the current directory with detailed information (`-l`), human-readable file sizes (`-h`), and sorted by modification time (`--sort=time`). This demonstrates how to display and sort directory contents in a user-friendly format.

Display disk usage statistics for all files and directories in the current directory, showing sizes in a human-readable format. This command recursively lists the sizes of files and directories.

List all files and directories recursively starting from the current directory. This command shows the contents of each directory and its subdirectories in a hierarchical format.

List files and directories in the current directory with detailed information, including file sizes in a human-readable format. This demonstrates the use of the `ls` command with the `-lh` options for detailed and human-readable output.

This snippet lists all directories in the `PATH` environment variable by splitting it into individual paths using `${PATH//:/ }` and then using `find` to locate directories within those paths. This demonstrates how to manipulate and search the `PATH` in Bash.

Search for `info` related commands using `apropos`, filter results with `grep`, and explore the `info` documentation using `man`, `info`, and `info 5`. This demonstrates how to access and navigate `info` documentation.

Display Bash documentation using `apropos` to search for related manual pages and `man` to view the Bash manual. This demonstrates how to access and read Bash documentation directly from the command line.

This snippet demonstrates the use of `sudo` to execute a command as the superuser. It first retrieves the current user with `whoami`, then uses `sudo whoami` to retrieve the superuser's username, and prints both results. This shows how `sudo` elevates privileges to perform commands as the superuser.

Remove files `output.out`, `error.err`, and `output-and-error.log` verbosely with `rm -v`. Delete the `tempDir/` directory recursively using `rm -r`. Optionally, use `trash-cli` to move files to the system trash instead of deleting them permanently. Warning: `rm` commands cannot be undone. This demonstrates file and directory cleanup in Bash.

The `htop` command is an interactive process viewer in the terminal, providing a real-time overview of system processes, CPU usage, memory consumption, and more. It allows users to monitor and manage running processes efficiently. This demonstrates process identification and system monitoring.

The `top` command is used to display real-time system summary information and a list of processes currently being managed by the Linux kernel. It helps in identifying and monitoring active processes and system resource usage.

Force a system reboot immediately using the `reboot` command with the `-f` option. This command bypasses the normal shutdown process and forces the system to restart.

The `reboot` command is used to restart the system immediately. This command is commonly used to apply changes or recover from system issues.

Cancel a scheduled shutdown using the `shutdown -c` command. This is useful for aborting a previously scheduled system shutdown.

This code schedules a system reboot in 5 minutes with the message "Cya later". It demonstrates using the `shutdown` command to reboot a system after a delay.

This command immediately reboots the system with the message "Cya later". It demonstrates the use of the `shutdown` command to restart the system.