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Category Archives: Linux
w3 total cache
Disabling w3 total cache: edit the wp-config.php file define (WP_CACHE’, true); from true to false (i.e. define (‘WP_CACHE’,false); Command line method of clearing w3 total cache: delete files form the wp-contentw3tc/pgcache/ directory http://www.frandimore.com/blog-setup/how-to-delete-w3-total-cache-properly/
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Add openstack.compute
git clone git://github.com/jacobian/openstack.compute cd openstack.compute python setup.py build sudo python
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Find largest apache process
ps -ylC apache2 | awk ‘{s+=$8} END {print s/1024/(NR – 1)}’ ps -ylC httpd | awk ‘{s+=$8} END {print s/1024/(NR – 1)}’ To calculate mysql usage: Calculate MySQL Memory Usage – Quick Stored Procedure
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check for mod_pagespeed
curl -D- http://example.com | grep X-Mod-Pagespeed shows all zeros if it isn’t installed if it is installed, % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 966 0 966 0 … Continue reading
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subsys is locked
If you get this error when doing service {servicename} status: {servicename} dead but subsys is locked You need to remove the {servicename} lock file rm /var/lock/subsys/{servicename}
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Checking whether a security cipher (ECDSA) is available
[root@ssltest test]# cat /etc/redhat-release Red Hat Enterprise Linux Server release 6.3 (Santiago) [root@ssltest test]# openssl version OpenSSL 1.0.0-fips 29 Mar 2010 [root@ssltest test]# openssl ciphers -v | grep ECDSA
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hardcode the WordPress siteurl to dev.mysite.com
When creating a dev version of a wordpress site, put the following in your wp-config for an immediate fix: define(‘WP_HOME’,’http://dev.mysite.com’); define(‘WP_SITEURL’,’http://dev.mysite.com’); Another option is to edit the wp_options table as follows: select * from wp_options where option_name=’siteurl’; update option_value set … Continue reading
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Translating Apache’s SSL Cipher Suite Directive
You can translate that to a readable list of algorithms with this command: openssl ciphers -v ‘ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP’ Read more on this site: http://unhandledexpression.com/2013/01/25/5-easy-tips-to-accelerate-ssl/
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Timezones in MySQL
Timezone [root@server02 ~]# date Fri Feb 24 02:11:38 CST 2012 MySQL time-zone: mysql> show global variables like ‘%time_zone%’; +——————+——–+ | Variable_name | Value | +——————+——–+ | system_time_zone | CST | | time_zone | SYSTEM | +——————+——–+ 2 rows in … Continue reading
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testing your site
Here are a couple of websites you can use to verify whether the site slowness is common for most clients or just your local network. http://host-tracker.com/ http://internetsupervision.com
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