You can use a hash function, avialable in any operation system, for example sha256sum with a photo or an mp3 file, any file you can easily remember. For example, from…
Delete a Command from Bash History Here I give some test commands to fill history: pontikis@ubuntu:~$ clear pontikis@ubuntu:~$ echo 1 1 pontikis@ubuntu:~$ echo 2 2 pontikis@ubuntu:~$ echo 3 3 pontikis@ubuntu:~$…
In Ubuntu, Grub boot menu is hidden by default. You can display it by pressing "SHIFT" continuously at boot time. This is useful (among other cases) in case you want…
After update Debian (or Ubuntu) using apt-get update && apt-get -V upgrade you need to know which services need restart and if system reboot is required (kernel upgrade). A common…
If you want to start a Youtube playlist from random video, just add: &index=random_number to the src attribute of the embed code. The code To produce a random number, I…
