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# Random Linux Tips (WIP)
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### 0. *Short example template.*
- Description: *What is this good for.*
- Requires: *Do you need any particular software (provide a link)?*
- How-to: *Straight forward description and maybe a code example.*
- *Detailled description if necessary.*
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- `sudo 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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- How-to: Add the following line to your crontab using the command "crontab -e" (or EDITOR=$editor crontab -e).
- `0 17 * * * /usr/bin/find ~/.cache/* -mtime +7 -exec /usr/bin/rmtrash -rf {} \;`
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- This command looks at files in ~/.cache every day at 5 p.m. and moves files older than 7 days to the trash.
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- Additionally: This can also be done using regular `rm` instead of `rmtrash` .
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### 2. Limit Systemd journal size.
- Description: Limit the Systemd journal to a specific size.
- Requires: Specific to systems using [Systemd ](https://systemd.io/ ).
- How-to:
- Edit `/etc/systemd/journald.conf` and change `SystemMaxUse=50M` .
- Additionally: [Arch wiki: Systemd ](https://wiki.archlinux.org/title/Systemd/Journal#Journal_size_limit ).
- 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
- Description: Enable syntax highlighting for nano.
- Requires:
- How-to: Edit `~/.config/nano/nanorc` or to `/etc/nanorc` and add the following.
- `include "/usr/share/nano/*.nanorc"` .
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https://wiki.archlinux.org/title/Nano#Syntax_highlighting
### 4. Repeat a command using watch.
### 5. Use sudo !!.
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### 6. Prevent overwriting files.
- Description: Use alias for *rm* , *cp* and *mv* .
- How-to: Add the following alias into your ~/.bashrc.
- 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
- Requires: A pacman-based distro and the pacman-contrib package.
### 8. Passwordless SSH
### 9. Automatically clean orphaned packages.
`0 20 * * * /usr/bin/pacman -Qtdq | /usr/bin/pacman -Rns -`