stdin, stderr, redirection and logs
Is there a difference between those two lines ?
Unix & Linux
Does a shortcut for executing a series of commands in bash history exist?
Suppose I have the following trivial example in my history:
Adding paths to PATH using a multi-line syntax
As far as I understand, the usual way to add a path to the PATH environment variable is by concatenating paths separated by the : character.
Escaping both forward slash and back slash with sed
I have the following string: /tmp/test/folder1/test.txt
How to search for files with immutable attribute set?
For config auditing reasons, I want to be able to search my ext3 filesystem for files which have the immutable attribute set (via chattr +i). I can’t find any options for find or similar that do this. At this point, I’m afraid I’ll have to write my own script to parse lsattr output for each directory. Is there a standard utility that provides a better way?
Finding out the default shell of a user within a shell script
I was wondering if there’s a way to find out the default shell of the current user within a shell script?
dmesg: read kernel buffer failed: Permission denied
Since recently Debian has changed the default behavior for dmesg and I cannot use it simply from my local user.
How to trigger error using Trap command
I am using Ubuntu 12.04.2. I am trying to use “trap” command to capture abnormal or error in my shell script but I am also trying to manually trigger “Error” exit.
When is /etc/bash.bashrc invoked?
What is this file anyway? Documentation makes no mention of it. And it’s not supposed to be run automatically (version 4.3, 2 February 2014):