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So this guide will help to make autorestart of MTA Server on linux Debian or Ubuntu (a daily restart improves server stability/minimizes lag). This works on all servers, so you need program called "CRON" to make autorestart. The program utility Cron is a time-based job scheduler in Unix-like computer operating systems. Instructions: №1 Check to see if "Cron" is already installed. which cron №2 If a path is returned, example: "/usr/bin/cron", then Cron is installed. Skip to №4. №3 Install Cron by typing. apt-get install cron №4 Now that Cron is installed, check the time line of crontab. Each line of a crontab file represents a job, and looks like this: ┌───────────── minute (0 - 59) │ ┌───────────── hour (0 - 23) │ │ ┌───────────── day of month (1 - 31) │ │ │ ┌───────────── month (1 - 12) │ │ │ │ ┌───────────── day of week (0 - 6) (Sunday to Saturday; │ │ │ │ │ 7 is also Sunday on some systems) │ │ │ │ │ │ │ │ │ │ * * * * * command to execute The syntax of each line expects a cron expression made of five fields, followed by a shell command to execute. For example i'll make autorestart every 24 hours. at time 03:00 By moscow time, before restart he will warn in 1 minutes about. (You can set your time zone by typing: dpkg-reconfigure tzdata) Create new crontab file (requirements nano, if you don't have install by typing apt-get install nano) crontab -e Send this example code using nano: 59 2 * * * screen -dr <NAME_OF_YOUR_SCREEN_WHERE_STARTED_MTA_SERVER> -p 0 -X stuff "$(printf "say Server will restart in 1 minute\r")" 00 3 * * * screen -dr <NAME_OF_YOUR_SCREEN_WHERE_STARTED_MTA_SERVER> -p 0 -X stuff "$(printf "shutdown\r")" 01 3 * * * screen -dr <NAME_OF_YOUR_SCREEN_WHERE_STARTED_MTA_SERVER> -p 0 -X stuff "$(printf "./mta-server\r")" Now save file with ctrl+x click y then click enter. File created, so all files crontab which makes commands by time located in /var/spool/cron/crontabs №5 Restart cron service by typing service cron restart Now MTA Server Should to make autorestart every 24 hours at 03:00 Moscow time. If you have problems with this, send to this thread your problem and i will reply.