Updated Template (markdown)

koalaman
2014-02-19 12:42:19 -08:00
parent 29b54e9d18
commit d79b51887a

@@ -1,35 +1,17 @@
# To run commands as another user, use su -c or sudo.
# (Message goes here)
### Problematic code:
./configure
make
su root
make install
(Simple example of problematic code)
### Correct code:
./configure
make
sudo make install # or su -c 'make install' root
(Simple example of above code, only fixed)
### Rationale:
`su` doesn't actually switch user. It starts a brand new shell, running as another user. You can't put `su foo` in a script to make the following command run as user `foo`.
Use `sudo -u username cmd` or `su -c cmd username` instead.
(An explanation of why the code is problematic and how the correct code is an improvement)
### Contraindications
If you want to present the user with a root shell or when you're redirecting input, you can ignore this message:
until mycommand
do
echo "Failed. You will now get a root shell. Fix problem and exit to retry."
su
done
or
exec < mycommands
su foo
(Cases where the user may choose to ignore this warning, if any.)