Check Number Of Connections

Project Notes

You can check the number of established network connections of a specific user or the number of network connections of a given command. Those two options can be combined. Note: This script uses lsof with sudo. Make sure your /etc/sudoers is properly configured. For example put the following line into /etc/sudoers nagios ALL=NOPASSWD: /usr/sbin/lsof Please refer to the manpages for further options. Examples of usage: /usr/local/nagios/libexec/check_connections.pl -w 200 -c 250 -C httpd Will check the number of network connections for any command containig httpd. If the number of established connections is equal to or exceeds 200 a warning is reported, if it's more or equal to 250 the an error. /usr/local/nagios/libexec/check_connections.pl -w 200 -c 250 -u apache Same as above except not commands containing httpd will be checked but any commands owned by user apache. You can also use uids instead of login names. /usr/local/nagios/libexec/check_connections.pl -w 200 -c 250 -u apache -C httpd This checks only commands containing httpd owned by user apache. Released under the LGPL, visit http://www.gnu.org/licenses/lgpl.html for details. Tested on: - Redhat Linux 7.3 (x86) - Fedora Core 4 (x86) - Gentoo Linux 2006.1 (x86) - Solaris 10 (sparc)