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landing/docs/Bash-Scripts/014-creating-custom-bash-commands.md

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+# Custom Commands
+
+Optimize repetitive terminal tasks. Custom commands, or aliases, create shortcuts for long or frequently used commands.
+
+### Creating an Alias
+
+Consider a common scenario: checking web server connections with a lengthy `netstat` command:
+
+```bash
+netstat -plant | grep '80\|443' | grep -v LISTEN | wc -l
+```
+
+Typing this repeatedly is inefficient. Create an alias as a shortcut. For example, let `conn` execute this command.
+
+```bash
+alias conn="netstat -plant | grep '80\|443' | grep -v LISTEN | wc -l"
+```
+
+Now, simply type `conn`:
+
+```bash
+conn
+```
+
+You'll get the same output.
+
+Enhance it with an informative message:
+
+```bash
+alias conn="echo 'Total connections on port 80 and 443:' ; netstat -plant | grep '80\|443' | grep -v LISTEN | wc -l"
+```
+
+Running `conn` will now yield:
+
+```
+Total connections on port 80 and 443:
+12
+```
+
+Note: Aliases created this way are temporary. They disappear when your terminal session ends.
+
+### Making Aliases Permanent
+
+Aliases are session-bound by default. To make them permanent, add them to your shell's profile file. For Bash, this is typically `~/.bashrc`.
+
+Open `~/.bashrc` (or create it if it doesn't exist):
+
+```bash
+nano ~/.bashrc
+```
+
+Add your alias to the end of the file:
+
+```bash
+alias conn="echo 'Total connections on port 80 and 443:' ; netstat -plant | grep '80\|443' | grep -v LISTEN | wc -l"
+```
+
+Save and exit.
+
+Apply changes without restarting your terminal:
+
+```bash
+source ~/.bashrc
+```
+
+Now, your custom command `conn` will be available in all new and sourced terminal sessions.
+
+### Listing Aliases
+
+To view all active aliases in your current shell, simply run:
+
+```bash
+alias
+```
+
+This helps in troubleshooting command behavior.
+
+### Conclusion
+
+Aliases are powerful tools for optimizing your terminal workflow, offering quick command shortcuts. While full Bash scripts offer more complexity, aliases provide an immediate, user-level solution without requiring root access for installation.
+
+> {notice} This content was inspired by a piece by softwareshinobi on Dev Team Six.