Tag: shell

How do I replace a string at an undetermined location in a .txt file with a Shell script?

I’m writing a Shell script using Bash to convert a Robot Framework resource file from Windows to Linux. The contents of the Resource file itself are not important, but here is the required “minimal, complete, and verifiable example”. beep is a typeless empty file used to test a site’s …

Evaluating command inside bash script leads to increment in $SHLVL

bash linux shell

I have the following bash script (myscript.sh): Now: before sourcing myscript.sh, $SHLVL is 2. After sourcing it, is 3. Why? Shouldn’t the command evaluation exit after echo? Thank you! Answer When you source a script in bash, $0 expands to bash (or at least, the name of the shell bash was started as). …

Moves files from directory by reading file names from a text file

bash for-loop linux shell ubuntu

I want a script that is able to read the content of a text file which contains folder names and moves the folders from their directory to a specific folder. Here is my script: This script is partly working as it copies only the last folder in the text file, as for the other folders it gives the error “n…

How can i give specific commands to programs via terminal Linux?

bash c++ linux python shell

I’m seeking for a way to automatize the configuration of some tasks i do, but, i am having some trouble to give the order to the programs from the terminal. I have actually to give, every time i try to configure some Routers, the same commands always and always, but, i’m looking for a way to creat…

Using bash, how can I remove the extensions of all files in a specific directory?

bash linux sh shell

I want to keep the files but remove their extensions. The files do not have the same extension to them. My end goal is to remove all their extensions and change them to one single extension of my choice. I have the second part down. My code so far: Answer You don’t need an external command find for this…

escape one variable but not the other in awk

awk bash centos linux shell

I’m facing a problem with awk in Linux. I would like to do make this script work : The problem here is that I want the variable “var” to be interpreted (it works) and the variable $OTHERVAR not to be interpreted, and this I what I can’t manage to do. In the end, I want to do this: I ha…

Getting the User ID from the last line of the /etc/passwd file in Linux

command linux scripting shell terminal

I’ve been trying the following: and These statements aren’t working, I’m not sure how to join both of them to get the result I want. It just takes the current command that is in front of the /etc/passwd directory. I’m fairly new to Linux and combining commands together. Thank you for t…

Split file into multiple when special char met

ksh linux shell

I have a main file as following : My final goal is to create a file that will containt only block that contains a specific string, for example if that string would be lines then I would have an output file like this : To reach my objective, I first try to split my main file into subfiles by bock

Save only one string of multi-string command output

bash gnome-terminal linux shell unix

I’ve got a bash command to find the largest file in a sub-directory. I’d like to save the output to a variable to use it with other commands. bigile=$(find /path/to/directory -type f -exec du -Sh {} + | sort -rh | head -n 1) Unfortunately, this saves both the file size and the filepath. If I pass …

Group the consecutive numbers in shell

awk linux shell

In shell, how to group the numbers in $foo as 1-3,6-8,11,13-17 Answer As an alternative, you can use this awk command: Now run it as: Here is an one-liner for doing the same: In this awk command we keep 2 variables: p for storing previous line’s number s for storing start of the range that need to be pr…