20 Linux System Monitoring Tools Every SysAdmin Should Know

Need to monitor Linux server performance? Try these built-in command and a few add-on tools. Most Linux distributions are equipped with tons of monitoring. These tools provide metrics which can be used to get information about system activities. You can use these tools to find the possible causes of a performance problem. The commands discussed …

Installing mcrypt – what to do to work with php

After a lot of research, as I couldn’t find answers on forums and other places. I found on sourceforge.net they released some rpm packages to integrate mcrypt and mhash with php. First we need to install mcrypt and mhash as follows: 1) Install mcrypt & mhash yum install mcrypt* yum install mhash* answer y to …

How do I change maximum attachment size in Horde?

Resolution By default, PHP limits uploaded files size to 2 MB, and this limit applies to all PHP application including Webmail. Edit the following options in /etc/php.ini file on the Plesk server and set the values that match your needs, for example: upload_max_filesize = 32M post_max_size = 32M Restart Apache after the php.ini file modification. …

Debian or Ubuntu Linux runlevel configuration tool to start service

Task: Command line tool to manage services / Ubuntu runlevel update-rc.d automatically updates the System V style init script links /etc/rcrunlevel.d/NNname to scripts /etc/init.d/name. These are run by init when changing runlevels and are generally used to start and stop. For example turn on ssh service type the command: