UNIX: show system variables

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All UNIX-like operating systems such as FreeBSD, Redhat, CentOS, Debian allows you to set environment variables. This variables are used by system applications. To find the current values of all your environment variables and functions you can any shell you’d like: sh, zsh, bash, etc… Below the list of system variables:

Shell builtin commands … Continue reading UNIX: show system variables

Load Average – LA

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Load Average This is a short article about Load Average – one of the main parameters, we should monitor running any server. So, what is load average? Load average (la) – is a number of processes that are standing in a queue and are waiting to be executed. Each process that is using or waiting … Continue reading Load Average – LA

tmpfs

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You can easily prolong the life of your HDD putting small, high access files into RAM. FreeBSD:

to mount tmpfs each time your system boots at scheduled reboots add to /etc/crontab:

Debian:

To have it automatically created at start add to /etc/fstab next:

Percona tools for Mysql

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Percona MySQL Toolkit Percona Toolkit for MySQL is a collection of advanced command-line tools created by Percona to perform a variety of MySQL and system tasks that are too difficult or complex to perform manually. These tools are ideal alternatives to private or “one-off” scripts because they are professionally developed, formally tested, and fully documented. … Continue reading Percona tools for Mysql