Edit fstab Manually to Monnt A Specific Partition

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1. On the old Mint OS, create a new partition with "Disk" tools, copy "apps", "docs", etc folders to the new partition;

2. Login Arch OS as root;

3. Get the UUID (and label) of the "home" partition with command blkid or lsblk -f;

4. Create user chad: useradd -m chad;

5. Modify /etc/fstab of the Arch OS,

   $ cat /etc/fstab ... UUID=... /home/chad ext4 ... 0 2

6. Reboot;

You can specify section in fstab (the first column) with "LABEL=..." instead of "UUID=...". Use e2label /dev/sda1 <label> to set partition label. But using UUID is a more reliable way.

Ref: Field definitions in fstab on Arch Wiki

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