CLI su --> switch user

[tajlor]

Here the results on my NAS:

as admin:
[~] which sudo
/Apps/opt/bin/sudo

[~] which visudo
/Apps/opt/sbin/visudo

[~] which opkg
/Apps/opt/bin/opkg

==> it seems i don't have installed optware because i don't have ipkg


visudo
...
## User privilege specification
root ALL=(ALL) ALL
admin ALL=(ALL) ALL
...

opkg update
Downloading http://qnapware.zyxmon.org/binaries-x86/Packages.gz.
Updated list of available packages in /Apps/opt/var/opkg-lists/packages.

[tajlor]

What's wrong with my configuration?
How can I fix it.
Sorry for the 1000 questions but I wanna fix this and need your help.

Thanks

[schumaku]

Probably nothing - looks like somehting that does not work on the TS-x59 NAS ... my examples came from a TS-451.

TS-459 Pro, QTS 4.2.0 20151025

[~] # cat /Apps/opt/etc/sudoers
...
##
## User privilege specification
##
admin ALL=(ALL) ALL
...

[~] # sudo ks
sudo: unknown user: root
sudo: unable to initialize policy plugin

Bugger...check with the maker and maintainer of QNAPware/Entware.

[tajlor]

Can u give me a hint who this is?

[schumaku]

Oh sorry please - create a new thread on the Entware sub-forum -> http://forum.qnap.com/viewforum.php?f=351 - feel free to quote my last reply with the "Probably nothing - looks like something that does not work on the TS-x59 NAS ..." right away.

[tajlor]

a note:
with the provided opkg v. 0.1.8-> http://forum.qnap.com/viewtopic.php?f=128&t=33213
"su" command works !!

[BUMPRW]

I've been trying different things for weeks to get NodeJs module node-gyp to remain. On Fedora 23 I do have to use su and not sudo to install the module. On a QNAP TS253 pro it installs under some Nodejs versions but it will be gone in the next reboot. Yes I do know admin is suppose to be root, but it appears to lack the proper characteristics. If I attempt to install node-gyp as admin at best I have a short term fix that doesn't last and most likely and has wiped out all my Nodejs modules on the next reboot. I know the difference between sudo and su is critical in Parrallels, how do we get the same distinctions in QNAP's Busybox? I haven't figured it out yet.
Example:
Fedora 23
sudo npm install -g node-gyp # the operating system can't find npm
su
password: xxxx
npm install -g node-gyp # has no problem installing
exit

On QNAP
npm install -g node-gyp # most of the time it says it is installed but really isn't there

[iam@nas]

For me this works fine:
1. Make sure that you have a local user. Switching to domain users is as far as I can tell not possible.
grep bill /etc/passwd
Output: "bill1234bill:/share/homes/bill:/bin/sh"

2. Make sure that you have sudo installed. I used opkg to install it
opkg list-installed | grep sudo
Output: "sudo - 1.8.xxx"

3. Switch user and start a shell as this is what you may want. Otherwise you may specify a process.
sudo -u bill /bin/sh
whoami
Output: "bill"
Here you may encounter problems with write permissions and the home directory which you may want to fix on your own. "homes" is protected so you may create a "home/bill" directory and set the permissions accordingly.