Mounting /proc with hidepid under Ubuntu
On most Linux systems, anyone can see everyone else’s processes, running commands, and so on. This can be achieved by simply issuing a ps ax … Read more
Written by: joho
Published on:
Linux
Ubuntu and Zimbra upgrade night session
Music: Great White, Guns ‘n’ Roses, Pink Floyd, Five Finger Deathpunch, Mötley Crüe, AC/DC, Rammstein Drink coffee, 3L Open 4-6 SSH sessions Do Ubuntu from … Read more
Written by: joho
Published on:
Compare files and directories recursively using diff
Compare files in the two directories, and only report differences: diff -q path-1/ path-2/ Compare files in the two directories and their sub-directories, only reporting … Read more
Written by: joho
Published on:
Ubuntu 20.04, Nginx, Redmine, Ruby, and Passenger-Phusion confusion
Redmine, Ruby, Passenger-Phusion, and Nginx makes for an extremely confusing situation with dependencies, installation “instructions”, and “mismatching” package versions. Redmine wants Ruby x, your Linux … Read more
Written by: joho
Published on:
Checking LSI RAID storage status in Linux
Flying blind is no fun and many hardware manufacturers are notoriously bad at providing info tools form their hardware for Linux. If you have an … Read more
Written by: joho
Published on:
Applications, Computers, Development, Linux, Sysadmin
Where did my Emacs color-theme go in Ubuntu 20.04.LTS?!
Having recently upgraded a small VPS from Ubuntu 18.04.LTS to Ubuntu 20.04.LTS, I ran into a little snag with Emacs and its color-theme (from the … Read more
Written by: joho
Published on:
pdftk and php-pdftk on Ubuntu 18.04 without using snap
During a product launch I recently came across an “interesting” issue involving pdftk (and php-pdftk). Some of the developers had made assumptions (ever heard that … Read more
Written by: joho
Published on:
Monitoring redis access and activity
Use redis-cli to monitor redis access and activity. redis-cli monitor or telnet localhost 6379 When the connection has been made, type MONITOR Use Ctrl+C or … Read more
Written by: joho
Published on:
Webmin, Virtualmin and APT for Ubuntu and Debian
I often use Webmin and Virtualmin to manage basic stuff on Linux servers, mostly so because others sometime need to change minor settings on these … Read more
Written by: joho
Published on:
Forcing apt-get to use IPv4
When or if you run into trouble with apt-get and IPv6 connections timing out or not resolving properly at all, it may be a good … Read more
Written by: joho
Published on: