I have a file contains numbers. 1 34 44 44 46 5 35 40 40 45 6 36 28 30 40 My goal is for each column to have the absolute value after subtracting the following value by the previous one as the below: 1 34 44 44 46 4 1 4 4 1 1 1 12 10 5 I
Tag: command
BASH: Filter list of files by return value of another command
I have series of directories with (mostly) video files in them, say I create a variable (video_dir) with the directory names (based on other parameters) and use that with find to generate the basic list. I then filter based on another variable (video_type) for file types (because there is sometimes non-video …
How to list filenames containing a specific string
I’ve been searching for commands that would print the list of filenames that contain a specific string, regardless if the string is part of a bigger string. So for instance, say there’s a directory with files “DABC.txt”, “ABC.txt”, “ABC”, and “CDA.txt̶…
Script in ubuntu to take CPU temperature and CPU usage in the same time and save to file [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 years ago. Improve this question I need to write script or command line code in Ubuntu which take CPU temperature and % of CP…
Terminal hangs when executing yum commands
During a patch window, the yum update command stopped running with a Bus Error. Now when I try to execute a yum command my terminal hangs and I need to kill the process. I have tried to kill all the yum commands running that showed with the ps -aef | grep yum, this did not help. I have tried to
Linux how to remove files in one folder where prefixes don’t match another folder?
I want to remove extra files in one folder where the prefix file names don’t match those in the other. A simple example will show: From folderA I want to remove frame0002.jpg and frame0006.jpg because those frameXXXX prefixes don’t exist in folderB. How can I do this automatically in 1 command lin…
Using sed with regex to match varying lines
I’m having some issues used sed to match a regex pattern. An example would be with the following lines: spring-core-4.0.0 should be spring-core-4.1.0 spring-web-4.0.0 should be spring-web-4.1.0 I want the regex to match any characters in between spring and the version number. I’m not sure if I nee…
grep -v with while read line command not working properly
I use this command to remove lines from (target.txt) that match string in (removefrom.txt) This is (target.txt) This is (removefrom.txt) This is the result should look like: But sometimes the resule is like: or or I ever try to use sed, but the problem is still there, It didn’t remove lines properly. An…
Sending linux commands in Perl – Grep piped to grep
The basic code: Why wont Perl complete these commands correctly? $fail2ban is already defined to 0, so that’s not the issue. The fail2ban.log does contain a line that should match(when running command from shell it matches): The error i keep getting is: All the commands run fine from bash/shell, seems a…
Is there a way to retrieve the script path called by a user-defined command?
I’m a newbie in GNU/Linux and, for a project, I need to do some reverse engineering. At a given line in a script, there is a command: I’m almost sure the “dc” command was previously added to the path/simlink/(?) by a previous developper. When executed, the command allows to run a simul…