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High swap usage on Ubuntu server

As you can see from vmstat output you do not have si or so activities, even the average (first line) is negligible. Try to play with swappiness but if you do not see serious performance degradation ...
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  • 3,015
2 votes

Postfix mysql warning: /etc/postfix/sql/mysql_virtual_alias_maps.cf: Permission denied

As expected, your postfix user has no permissions to read the configuration files. sudo chmod o+r /etc/postfix/sql/* Or, if you don't want other users to read the files sudo chown :postfix /etc/...
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2 votes

High swap usage on Ubuntu server

In my opinion, this shouldn't be interpreted as an argument to do a RAM upgrade directly since there are many factors regarding SWAP, one being swappiness. From Ubuntu FAQs: What is swappiness and how ...
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  • 23
1 vote

How to run two different applications simultaneously in same port with same Machine in Ubuntu

You may assign different ip addresses to your nic(s). Each application should listen on different ip possibly with the same port. Like 192.168.0.3:3000 and 192.168.0.4:3000. For public service you ...
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  • 250
1 vote
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When ufw enabled, FTP client stuck on: 150 Opening ASCII mode data connection

As you have open already port 20 you can make ftp to use passive connection by enter command pass after you authenticate.
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  • 3,015
1 vote

how to stop scheduled auto reboots on Ubuntu

You can check in cron records for root user. IMHO other users can't reboot your machine. And next time be careful when install unknown scripts :)
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  • 3,015
1 vote

Ubuntu Server 21.04 Update Error On apt update

Ubuntu 21.04 (Hirsute Hippo) End of Life reached on January 20 2022.
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  • 8,139
1 vote
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Why I can not register gitlab-runner? 10.0.2.3:53: server misbehaving

I had a similar issue/error msg which seemed to be saying that the gitlab server couldn't be found. ERROR: Registering runner... failed runner=XXXX status=couldn't execute POST ...
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