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README.md
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README.md
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# Random Linux Tips (WIP)
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# Random Linux Tips (WIP)
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*This is a random collection of useful thing I came across by simply using Linux.
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It's mostly distro-agnostic and sometimes specific for Arch- and/or pacman-based distros.*
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### 0. *Short example template.*
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- Description: *What is this good for.*
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- Requires: *Do you need any particular software (provide a link)?*
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- How-to: *Straight forward description and maybe a code example.*
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- *Detailled description if necessary.*
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- `sudo this is the actual code lol`
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- `# this is the actual code lol`
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- Aditionally: *Anything else that might be important like additional ressources.*
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### 1. Automatically clear cache.
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- Description: Move files older than a specific amount of time from your user's ~/.cache directory to the trash.
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- Requires: [rmtrash](https://github.com/PhrozenByte/rmtrash).
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### 2. Limit Systemd journal size.
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- Description: Limit the Systemd journal to a specific size.
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- Requires: Specific to systems using [Systemd](https://systemd.io/).
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- How-to:
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- Edit `/etc/systemd/journald.conf` and change `SystemMaxUse=50M`.
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- How-to: Edit `/etc/systemd/journald.conf` and change `SystemMaxUse=50M`.
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- Additionally: [ArchWiki: Systemd](https://wiki.archlinux.org/title/Systemd/Journal#Journal_size_limit).
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- Additionally: This can also be achieved using `journalctl` and be [limited by time](https://wiki.archlinux.org/title/Systemd/Journal#Clean_journal_files_manually).
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### 3. Syntax highlight for nano
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- Description: Enable syntax highlighting for nano.
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- Requires:
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- Requires: The [nano](https://www.nano-editor.org/) editor.
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- How-to: Edit `~/.config/nano/nanorc` or to `/etc/nanorc` and add the following.
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- `include "/usr/share/nano/*.nanorc"`.
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- Additionally: [ArchWiki: Nano](https://wiki.archlinux.org/title/Nano#Syntax_highlighting).
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### 4. Repeat a command using watch.
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- Description: Repeat and watch a command in a custom interval.
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- Requires: The [procfs](https://gitlab.com/procps-ng/procps) package.
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- How-to: Use `watch` followed by your command.
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- Example: `# watch -n 1.0 "du -h -s ./$folder`
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- This prints the summarized size of $folder in human-readable format every second.
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- Additionally: ---
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### 5. Use sudo !!.
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- Description: Repeat the last command using sudo.
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- Requires: The [sudo](https://www.sudo.ws/) package.
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- How-to: Just type `sudo !!` and the last command will be repeated using `sudo`.
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- Additionally: ---
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### 6. Prevent overwriting files.
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- Description: Use alias for *rm*, *cp* and *mv*.
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- How-to: Add the following alias into your ~/.bashrc.
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- Use *-interactive* option to get asked before overwriting files.
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- `alias mv="mv -i"`
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- Additionally: Further reading in the Arch wiki.
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### 7. Paccache timer
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- Requires: A pacman-based distro and the pacman-contrib package.
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- Additionally: [ArchWiki: Core utilities](https://wiki.archlinux.org/title/Core_utilities#Preventing_data_loss).
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### 7. Auto-clean package cache.
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- Description: Automatically clean the pacman package cache using paccache.
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- Requires: A [pacman-based distro](https://en.wikipedia.org/wiki/List_of_Linux_distributions#Pacman-based) and the [pacman-contrib](https://github.com/archlinux/pacman-contrib) package.
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- How-to: Enable the paccache.timer.
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- # systemctl enable paccache.timer
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- Additionally: Edit the paccache.service in /usr/lib/systemd/system/ and change the command to e.g. keep the latest installed version and no uninstalled version of all packages: `ExecStart=/usr/bin/paccache -rk1 && /usr/bin/paccache -ruk0`
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### 8. Passwordless SSH
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### 9. Automatically clean orphaned packages.
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`0 20 * * * /usr/bin/pacman -Qtdq | /usr/bin/pacman -Rns -`
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- Description: Connect to a device using SSH without a password.
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- Requires:
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- How-to:
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-
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- Additionally:
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### 9. Automatically clean orphaned packages.
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- Description: Automatically remove orphaned packages.
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- Requires: A pacman-based distribution.
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- How-to: Add the following line to your crontab.
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- `0 20 * * * /usr/bin/pacman -Qtdq | /usr/bin/pacman -Rns -`
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- Additionally: This example removes orphans everyday at 8 p. m. but the
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### 10. Automatic retrieve latest mirrors.
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- Description: Automatically retrieve the latest Arch Linux mirrors and write them to the mirrorlist.
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- Requires: An Arch-based distro and [reflector](https://xyne.dev/projects/reflector/).
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- How-to: Install reflector and enable the reflector.timer.
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- `# systemctl enable reflector.timer`
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- Additionally: [ArchWiki](https://wiki.archlinux.org/title/Reflector#systemd_timer).
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