Do you see this message on every login to your Ubuntu system? “Could not load list of meta packages: [Errno 12] Cannot allocate memory”. The error indicates there was not enough RAM available to complete the task. Here I explain where the message comes from and how to get rid of it.
If you executed a command and neglected to use sudo, you can execute “sudo !!” to re-execute the previous command with sudo prepended.
Here’s a shell script to quickly test if a user can run sudo commands.
How to have the screen command log its output in realtime to a file. Purely command line, no .screenrc file involved.
A simple script to follow-tail a file’s changes with ansi color styling.
One small and easy command to fix InnoDB ‘column last_update in table “mysql”.”innodb_table_stats”‘ type mismatch error.
Address plus-tagging configuration in Postfix for mail forwarding relays
Display data traffic statistics and estimates from vnStat for today and the current month on your Ubuntu Server login motd (message of the day)
A CLI command to recursively garbage collect many local git repositories at once.
System settings to improve memory swapping to disk
One command to safely update, upgrade, dist-upgrade and autoclean your Ubuntu box with apt-get.
Generate and install multi-domain (SAN) certificate from Let’s Encrypt for nginx and Postfix.