I was migrating /var directory on some on-premises server I was working on from a low space disk to a larger one and I had to use the infamous rsync for this. I found the necessary parameters to on this article but I didn't like the idea of copying & pasting blindly without knowing what each parameters do. So I just looked the man page of rsync and decided to document what I found here for future references.
The full command I used:
rsync -aqx /var/* /mnt/newvar
Here's a table with each flag explained:
| Flag | Usage |
|---|---|
| -a | Shorthand for -rlptgoD
|
| -r | Recursive |
| -l | Copy symlinks as symlinks |
| -p | Preserve permissions |
| -t | Preserve modification time |
| -g | Preserve group |
| -o | Preserve user |
| -D | Preserve devices files & special files |
| -x | Don't cross filesystem boundaries () |
| -q | Make it quiet |
The -x flag means don't copy other filesystem files and directories like NFS, Samba, ..etc. 1
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