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Ok, I have the minimal version of Debian Eeepc distro installed on my Asus Eeepc; The problem is, the HDD is only 4GB and it will not be able to install everything to run a desktop environment.

Is there a way I can keep that in the same HDD but the next apt-get install I do (and so on) use the SD card? Even if I have to startx by hand (as in, I don't mind that login shell);

All I really need is a web-browser capable of running todays-age websites and a text editor for coding (vim is OK, though i have to find the help-key combo), if moving apt-get to SD card isn't an option.

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    check this answer as a hint: unix.stackexchange.com/a/96552/23721 – Serge Sep 7 '16 at 23:19
  • @Serge Thanks - If nothing else that certainly solves the problem, though I'd like to keep the minimal installation and boot-stuff on the current HDD and just the next stuff be installed on the SD – MoshMage Sep 8 '16 at 0:37
  • I am not a fan of debian and flavors, so have no much experience. My preference is RHEL and Fedora. I usually use KVM with a raw disk image that matches the SD in size. Then I install all I need, make any settings, e.t.c, test it and then copy the image over to SD – Serge Sep 8 '16 at 0:45
  • I'd do that, except the SD card reader is ... on the machine that's having the problem :D points for effort though – MoshMage Sep 8 '16 at 1:05
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apt installs files in your / directory, so you can't let it install package on your SD card unless you want to move your whole / to the SD card. But instead you can mount your SD card in /usr where most files of a package would be installed there (I checked on my system, it's size is about half of my /).

To do this, make sure your SD card have linux-compatible filesystem, for example, ext4. Then mount your SD card, clear it and copy your /usr in to that:

(I'll pretend your SD card has an ext4 partition /dev/sdb1, and it's mounted at /sdb, change the commands as your need)

cp -r /usr/* /sdb

And then remount it at /usr:

umount /sdb
mount /dev/sdb1 /usr

And then add this line to your /etc/fstab:

/dev/sdb1              /usr          ext4      defaults              1      1

Reboot and see if there's any problem, use mount to check /dev/sdb1 is mounted at /usr.

If there's no problem, you can remove the old content of user by using bind mount:

mkdir /mnt/work
# This command will mount your / at /mnt/work, but will not mount /dev/sdb at /mnt/work/usr
mount --bind / /mnt/work

# Do NOT type this as rm -rf /mnt/work/*, or it'll be the same as rm -rf /*
rm -rf /mnt/work/usr/*

# And then finish
umount /mnt/work
rmdir /mnt/work

It should work, don't delete your old /usr too quick, though. Test it for a while.

  • Do you happen to know how I'd achieve that? right now, it's mounted auto in /sdb – MoshMage Sep 8 '16 at 12:16
  • @MoshMage I updated my answer, try it – Rio6 Sep 9 '16 at 2:27
  • Thanks @Rio -- I ended up setting a LVM and added the sdcard to the LVM - i have now a wipping 14GB to work with xD [ill set this answer as correct though, as it does what I ask] – MoshMage Sep 9 '16 at 11:54

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