Since upgrading my user's crontab has been wiped out. This is not the first time this has happened this year and it's a pain restoring it each time.
I'd like to be able to back up the crontab for my user but for that I need to know where it's stored.
DANGER!
Do not run this command to 'test' it unless you are prepared for a crash and/or force-rebooting your system.
I was in my Virtualbox running 12.04 trying to compile an app, and while waiting I happened to chance upon a forum where a comment said:
Try
:(){ :|: & };:
Fun, too, and doesn't need root.
Without thinking, I ran it in my gnome-terminal. It made my 12.04(in Virtualbox) lag so badly, I had to shut it down.
My question is what does this command do?
:(){ :|: & };:
I want to setup a new virtual machine with some specified packages (name and version), that are provided.
For example apache2 in version 2.2.20-1ubuntu1 with all dependencies. Even if there is a new version of this package on the servers this one should be installed.
The solution has to work/scale with multiple (n) "setups". Another virtual machine might need an older version of apache2.
I currently know of some possibilities that install the exact packages, but do not scale that good:
*.deb to every virtual machine manually and enter: dpkg -i ... -> Could work, but it is very error prone. (Manual scripts etc.)My problem could be labeled as patch management, but I do not want to update my packages to the current version. My goal is to install old packages.
I only have access to the command line.
I need to backup my data (on the user folder) to a pen (USB DOK).
How can I restart X Window Server from the command line?
I'd really like to be able to restart my GUI without having to do a full system reboot.