Try this first: Cat /var/log/asterisk/messages|grep "channels unavailable"
Once you get grep output from this, changing the grep on the tail command should produce the desired results. Since the tail -f is a dynamic situation, it is much easier to make the test on the fixed cat command. -----Original Message----- From: asterisk-users-boun...@lists.digium.com [mailto:asterisk-users-boun...@lists.digium.com] On Behalf Of Philipp Kempgen Sent: Friday, December 12, 2008 7:30 AM To: Asterisk Users Subject: Re: [asterisk-users] say I wish to run tail command on messages file to pick up if any "channels unavailable" messages appear. Shaun Wingrin schrieb: > Can I use grep ? Tried but not working. tail -f /var/log/asterisk/messages | grep 'channels unavailable' Philipp Kempgen -- http://www.das-asterisk-buch.de - http://www.the-asterisk-book.com Amooma GmbH - Bachstr. 126 - 56566 Neuwied -> http://www.amooma.de Geschäftsführer: Stefan Wintermeyer, Handelsregister: Neuwied B14998 -- _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users