On the paragraph explaining arithmetic expansion, Bash’s user guide uncovers 2 different ways of evaluating an expression, the first one uses $(( EXPRESSION )) and the second one uses $[ EXPRESSION ]. The two ways seem pretty similar as the only difference I have found is:
On a Debian Jessie system with systemd, how can I configure the terminals so that a message like Press enter to activate this console is displayed and the login prompt does not appear before hitting enter?
I found that pidstat would be a good tool to monitor processes. I want to calculate the average memory usage of a particular process. Here is some example output:
btrfs supports reflinks, XFS supports reflinks (since 2017 I think?).
My bash script:
I am in a situation where several users are sharing the same user account on a remote machine. I have a “personal” directory where I wrote my own .zshrc file, and I would like to have a way to:
I found two commands to output information about my CPU: cat /proc/cpuinfo and lscpu. /proc/cpuinfo shows that my CPU speed is 2.1 Ghz, whereas lspcu says it is 3167 Mhz. Which one is correct?
I am considering using btrfs on my data drive so that I can use snapper, or something like snapper, to take time based snapshots. I believe this will let me browse old versions of my data. This would be in addition to my current off site backup since a drive failure would wipe out the data and the snapshots.
I have a systemd container running, and I can login into it with machinectl login <container>. How can I execute a command inside the container directly, i.e. without first logging in, executing the command, and then logging out?