Can I configure bash to execute “clear” before every command typed in the console?
I would like to configure bash to execute clear command every time I type some command in the terminal (before executing my command). How can I do that?
Unix & Linux
Where is bash’s history stored?
If I run history, I can see my latest executed commands.
How to run a fresh version of AIX in a Virtual Machine with a Linux host?
I need to learn about AIX, and I only have a laptop with Fedora 14/VirtualBox on it. Is there any chance that I could run an AIX guest in my VirtualBox?
Why can’t I run GUI apps as root: “No protocol specified”?
I installed Debian onto my machine last night. Now, I don’t understand why I can’t run GUI apps from a terminal when running as root.
login/non-login and interactive/non-interactive shells
login shell: A login shell logs you into the system as a specific user, necessary for this is a username and password. When you hit ctrl+alt+F1 to login into a virtual terminal you get after successful login: a login shell (that is interactive). Sourced files:
How to output string completions to stdout?
Some of the git commands have many options, and it would often be useful to search through them for the one I need – I was just looking for the option which controls the TAB width in git-gui, but there are about 200 completions for git config. An obvious workaround is to copy all the completions into an editor and search through them, but I’d rather do
Do we have more history for cd?
cd - can move to the last visited directory. Can we visit more history other than the last one?
How can I “grep” patterns across multiple lines?
It seems I am misusing grep/egrep.
Kill all descendant processes
I’m writing an application. It has the ability to spawn various external processes. When the application closes, I want any processes it has spawned to be killed. Sounds easy enough, right? Look up my PID, and recursively walk the process tree, killing everything in sight, bottom-up style. Except that this doesn’t work. In one specific … Read more
/dev/tcp listen instead of nc listen
With a netcat listener like: