Using "screen -S sessionName .script" in SSH: Difference between revisions
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Often enough, one is logged in as root and decides to su – to an underprivileged user. Due to the tty for the root shell being owned by the user root, the su’d environment is unable to run screen: | Often enough, one is logged in as root and decides to su – to an underprivileged user. Due to the tty for the root shell being owned by the user root, the su’d environment is unable to run screen: | ||
root@whitegirl:~# su - joe | <syntaxhighlight lang="xml" line>root@whitegirl:~# su - joe | ||
joe@whitegirl:~$ screen | joe@whitegirl:~$ screen | ||
Cannot open your terminal '/dev/pts/0' - please check. | Cannot open your terminal '/dev/pts/0' - please check. | ||
joe@whitegirl:~$ | joe@whitegirl:~$</syntaxhighlight> | ||
This is resolved by setting the owner of the terminal device to the target user before running su, so the user then has write privileges on the pseudo teletype device: | This is resolved by setting the owner of the terminal device to the target user before running su, so the user then has write privileges on the pseudo teletype device: | ||
root@whitegirl:~# chown joe `tty` | <syntaxhighlight lang="xml" line>root@whitegirl:~# chown joe `tty` | ||
root@whitegirl:~# su - joe | root@whitegirl:~# su - joe | ||
joe@whitegirl:~$ screen | joe@whitegirl:~$ screen</syntaxhighlight> | ||
And then revert it when done | And then revert it when done | ||
[screen is terminating] | <syntaxhighlight lang="xml" line>[screen is terminating] | ||
joe@whitegirl:~$ logout | joe@whitegirl:~$ logout | ||
root@whitegirl:~# chown root `tty` | root@whitegirl:~# chown root `tty` | ||
root@whitegirl:~# | root@whitegirl:~#</syntaxhighlight> | ||
</div> | </div> | ||
</div> | </div> | ||
[CTRL+a] then [d] will detatch you from the screen-session. | |||
---- | |||
General info about 'screen' can be found [https://packages.debian.org/stretch/screen here]. | |||
A nice guide can be found [https://nathan.chantrell.net/linux/an-introduction-to-screen/ here]. | |||
[[Category:Debian]] | [[Category:Debian]] | ||
Latest revision as of 16:01, 27 June 2017
If you get Cannot open your terminal '/dev/pts/0' - please check. look here :-)
Credit to http://debianaddict.com/
Often enough, one is logged in as root and decides to su – to an underprivileged user. Due to the tty for the root shell being owned by the user root, the su’d environment is unable to run screen:
root@whitegirl:~# su - joe
joe@whitegirl:~$ screen
Cannot open your terminal '/dev/pts/0' - please check.
joe@whitegirl:~$This is resolved by setting the owner of the terminal device to the target user before running su, so the user then has write privileges on the pseudo teletype device:
root@whitegirl:~# chown joe `tty`
root@whitegirl:~# su - joe
joe@whitegirl:~$ screenAnd then revert it when done
[screen is terminating]
joe@whitegirl:~$ logout
root@whitegirl:~# chown root `tty`
root@whitegirl:~#[CTRL+a] then [d] will detatch you from the screen-session.
General info about 'screen' can be found here.
A nice guide can be found here.