Category Archives: code snippets

Apparently the Fn-F7 option on the Lattitude 13 and other models causes breakage with Ubuntu 11.04 putting blocks on wireless. So if you’re getting: tail -f /var/log/syslog Jun 28 11:58:43 latitude13 kernel: [42125.406612] iwlagn 0000:0c:00.0: RF_KILL bit toggled to enable radio. Jun 28 11:58:45 latitude13 kernel: [42127.020863] iwlagn 0000:0c:00.0: RF_KILL bit toggled to disable radio. [...]

Using “xe host-data-source-list” and “xe host-data-source-query” I made some basic UserParameter for xenserver below. UserParameter=xe.vmcountup,sudo /opt/xensource/bin/xe vm-list | grep running | wc -l UserParameter=xe.vmcountdown,sudo /opt/xensource/bin/xe vm-list | grep halted | wc -l UserParameter=xe.memory_total_kib,sudo /opt/xensource/bin/xe host-data-source-query data-source=memory_total_kib UserParameter=xe.memory_free_kib,sudo /opt/xensource/bin/xe host-data-source-query data-source=memory_free_kib UserParameter=xe.xapi_memory_usage_kib,sudo /opt/xensource/bin/xe host-data-source-query data-source=xapi_memory_usage_kib UserParameter=xe.xapi_free_memory_kib,sudo /opt/xensource/bin/xe host-data-source-query data-source=xapi_free_memory_kib UserParameter=xe.xapi_live_memory_kib,sudo /opt/xensource/bin/xe host-data-source-query data-source=xapi_live_memory_kib UserParameter=xe.xapi_allocation_kib,sudo /opt/xensource/bin/xe host-data-source-query [...]

Grab Zabbix RPM for CentOS 5 from http://download.opensuse.org/repositories/home:/ericgearhart:/zabbix/CentOS_CentOS-5/ for your architecture. wget http://download.opensuse.org/repositories/home:/ericgearhart:/zabbix/CentOS_CentOS-5/i386/zabbix-1.8.3-12.1.i386.rpm wget http://download.opensuse.org/repositories/home:/ericgearhart:/zabbix/CentOS_CentOS-5/i386/zabbix-agent-1.8.3-12.1.i386.rpm #installs fine rpm -Uv zabbix-1.8.3-12.1.i386.rpm #openssl-devel needed for zabbix_agentd rpm -Uv zabbix-agent-1.8.3-12.1.i386.rpm warning: zabbix-agent-1.8.3-12.1.i386.rpm: Header V3 DSA signature: NOKEY, key ID a8022b27 error: Failed dependencies: openssl-devel >= 0.9.7d is needed by zabbix-agent-1.8.3-12.1.i386 #try and install openssl-devel yum –enablerepo=base install openssl-devel [...]

These are not very efficient (two sorts in one line for example) but for my needs work fine (improvements welcomed). Create a list of “filenames|size in bytes” of all httpd owned files sorted by reverse size: find “/path/to/examine/” -user httpd -type f -printf ‘%p|%s\n’ | sort -t \| +1 -2 > httpd.usage.txt results: /path/to/examine/some/user/files/file0.jpg|99995 /path/to/examine/some/user/files/file7.jpg|99994 [...]

Install: wget http://dag.wieers.com/rpm/packages/rpmforge-release/rpmforge-release-0.3.6-1.el5.rf.x86_64.rpm rpm -Uv rpmforge-release-0.3.6-1.el5.rf.x86_64.rpm yum install sendmail sendmail-cf cyrus-sasl-plain cd /etc/mail vi sendmail.mc change from: DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA’)dnl change to: DAEMON_OPTIONS(`Port=smtp, Name=MTA’)dnl add: define(`confAUTH_MECHANISMS’, `LOGIN PLAIN’)dnl add: TRUST_AUTH_MECH(`LOGIN PLAIN’)dnl make sendmail.cf -C /etc/mail chkconfig sendmail on chkconfig saslauthd on /etc/init.d/sendmail start /etc/init.d/saslauthd start adduser someusername (the username to allow relay) passwd someusername (the username [...]

While migrating cacti over to a new virtual machine I got “ERROR: This RRD was created on another architecture” in /var/log/httpd/error_log when the crontab ran resulting in blank graphs.

A quick reference for a from-scratch Zabbix install on CentOS 5.3. We’ve used Zabbix for the past 3 or 4 years and just implementing 1.6.5 across multiple Xen nodes for funky distributed monitoring.