~ is set to /tmp for user root

[ting]

This is at least unusual. Why shouldn't we put root to /root as always?

[carsten]

If you haved looked correctly you would see root had of course his own directory! Because we work on an embbeded device and the whole / is read only in a squashfs+lzma partition the /root directory has to placed else there.

So take a deeper look in the filesystem! The /root directoy is linked to /usr/root

root@SA200-hbg:~# ls -la /
drwxr-xr-x   11 1000     1000         4096 Dec 26 14:24 .
drwxr-xr-x   11 1000     1000         4096 Dec 26 14:24 ..
drwxr-xr-x    2 1000     1000         4096 Dec 26 14:24 bin
drwxr-xr-x    1 root     root            0 Jan  1  1970 dev
drwxr-xr-x    3 1000     1000         4096 Dec 26 14:23 etc
lrwxrwxrwx    1 1000     1000            9 Dec 26 14:24 home -> /usr/home
drwxr-xr-x    3 1000     1000         4096 Dec 26 14:24 lib
lrwxrwxrwx    1 1000     1000           10 Dec 26 14:24 media -> /tmp/media
dr-xr-xr-x   31 root     root            0 Dec 27  1906 proc
lrwxrwxrwx    1 1000     1000            9 Dec 26 14:24 root -> /usr/root
drwxr-xr-x    2 1000     1000         4096 Dec 26 14:24 sbin
drwxr-xr-x    1 root     root            0 Dec 29 09:11 tmp
drwxr-xr-x    2 1000     1000         4096 Dec 25 18:47 usr
drwxr-xr-x    7 1000     1000         4096 Dec 29 08:53 var
root@SA200-hbg:~#

What you see only the path of the login shell! And again, we work on an embbeded device! There is not really a good reason to work as root.