sebthom.de » Linux http://sebthom.de IT Freelancer - Java, J2EE, IBM WebSphere Portal, Lotus Notes/Domino Thu, 09 Sep 2010 12:18:34 +0000 http://wordpress.org/?v=abc en hourly 1 Determine the user who logged on via SSH http://sebthom.de/134-determine-the-user-who-logged-on-via-ssh/ http://sebthom.de/134-determine-the-user-who-logged-on-via-ssh/#comments Mon, 23 Feb 2009 16:16:23 +0000 Sebastian Thomschke http://sebthom.de/134-determine-the-user-who-logged-on-via-ssh/ Today we had the need to determine the initial id of a user who logged onto a Linux box via SSH and executed the su command. When the su command is issued the effective user is changed and whoami or id commands will report that new user id instead. For anyone who is interested, that is [...]]]> Today we had the need to determine the initial id of a user who logged onto a Linux box via SSH and executed the su command. When the su command is issued the effective user is changed and whoami or id commands will report that new user id instead.

For anyone who is interested, that is what we came up to put the initial user id into a variable named ${LOGIN_USER}

LOGIN_USER=`who -m`; LOGIN_USER=${LOGIN_USER%% *}

or alternatively

LOGIN_USER=`who -m | cut -d' ' -f1`

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Post tags: bash, Linux, username

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