Is there a tool that combines zcat and cat transparently?
When handling log files, some end up as gzipped files thanks to logrotate and others not. So when you try something like this:
Unix & Linux
Using awk to sum the values of a column, based on the values of another column
I am trying to sum certain numbers in a column using awk. I would like to sum just column 3 of the “smiths” to get a total of 212. I can sum the whole column using awk but not just the “smiths”. I have:
set LC_* but not LC_ALL
I’d like to have a German (Austria) locale (A4 paper size, 24 hour time, yyyy-mm-dd), but an English-language user interface (I don’t like poor translations). I figured that the correct way to achieve this is to set the LC_ variables as follows in my .bashrc (please correct me if I’m wrong):
Concatenate multiple files with same header
I have multiple files with the same header and different vectors below that. I need to concatenate all of them but I want only the header of first file to be concatenated and I don’t want other headers to be concatenated since they are all same.
What does dd stand for?
I know very well what the command does, but man dd, info dd tell me: ‘Convert and copy a file’, as does GNU Coreutils.
extract value between two search patterns on same line
I have the following in a file Output.dat. I need to extract the value between dn: uid= and ,ou=
Windows Managers vs Login Managers Vs Display Managers Vs Desktop Environment
I posted a question and noticed people weren’t distinguishing correctly between many of these things: Windows Managers vs Login Managers Vs Display Managers Vs Desktop Environment. Can someone please clear this up, i.e. tell us the difference between them and how they are related perhaps?
How to start 2FA-using OpenVPN with systemd?
I have openvpn config that users 2 factor authentication.
Command line tool to “cat” pairwise expansion of all rows in a file
Suppose I have a file (call it sample.txt) that looks like this:
How do ssh remote command line arguments get parsed
I’ve seen the questions and answers about needing to double-escape the arguments to remote ssh commands. My question is: Exactly where and when does the second parsing get done?