feat: add a Bash script to help Linux user manage Backrest

[Nebulosa-Cat]

This Bash script include those feature:

1. Install / Update / Uninstall Backrest
2. Start / Stop / Check Status of Backrest

When it install Backrest it will check CPU/Kernel tpye ( x86_64, Armv6, Arm64), if not those type it should stop the install process.

After check CPU/Kernel tpye, it will use wget to download the correct version of Backrest install pack from newest release. Then create a folder/path name "backrest" under /home/username, then unpackage the install pack the install pack and run installer.sh inside it, after that it will clean the install file (remove the /home/username/backrest).

Uninstall feature is same as install but excute the uninstall.sh script.

other feature use sudo systemctl command to manage it.

Which plateform this script should support:
Linux running on x86_64, armv6~v8 CPU/Kernel

I have test the x86_64 and Armv8, other version I don't have device or enviroment to test it.

[garethgeorge]

Hey! Thanks for sending this out, just pinging in to let you know this is on my plate -- will aim to merge this weekend after I've had some time to play with this, test on MacOS, possibly cover usage in the docs.

[Nebulosa-Cat]

and if possible I think might be need to notice if user's restic, rclone is install as root or they need to backup root file (like /root or /var) maybe need use "sudo" when they run this script

when the user install not use sudo get.sh will create a systemd using user (user) and user (group)
config file will in /home/user/.config/backrest
cache file will in /home/user/.local/share/backrest, the /home/user/.local/share/backrest/restic-0.16.4 or similar file's permission should be rwxr-xr-x, this must be check or the all backup function or index will error.

if use sudo get.sh to install this will install as root use
config file will in /root/.config/backrest
cache file will in /root/.local/backrest

and all restic or rclone config file should in same user (any user or root)

[garethgeorge]

Hey thanks for contributing this! I just noticed after merging that you have a header re: attributions. I hope it's alright if I go ahead and update your website / author comment to a link to your github, I'm thinking this

#=================================================
#	System Required: Linux
#	Description: Backrest Helper
#	Contributed-By: https://github.com/Nebulosa-Cat
#=================================================

I'm a bit more comfortable with that relative to an arbitrary domain -- hope that's alright :)

Otherwise looks awesome.

[Nebulosa-Cat]

sure, I forget this lol
link to my github page is much better and this is why this script shold commit to this repo not just link from my repo, thanks!