I have tried this command in bash linux The output is value. But if I put it in a variable, it doesn’t work. For example: The output is nothing. What wrong? Answer Do it like this:
Tag: bash
How can I merge two files in one using BASH or Python script?
We assume that I have two files like this: File1 : File2 : I want to combine them in order to get one file with this output file : OuputFile : So, in Windows, I made this batch file to get what I expected, but, I have no idea how to do it in BASH (Bourne-Again shell) or in Python
Image upload using curl
I want to upload image to remote site using curl cli version, i browse several pages here, but not able to solve my problem. I log http header in firefox while uploading image: Answer The basic curlsyntax would be curl -F “image=@/yourPath/yourImageFile.jpg” ‘https://www.site.xxx/upload_pr…
Bash script: Looping through directories over SSH and downloading them to local machine
I’m trying to write a bash script that: Loops through all the directories in a folder over an SSH server Downloads a file (titled say, “foo”) inside each of these folders to a local machine. At the moment, I have: I don’t think I can use scp while I’m accessing the SSH server, ho…
U-Boot version extraction for comparision
I am trying to extract U-Boot version from its binary for comparison, consider that exact string what I want to search is as follow, so I wrote command with regex as follows, However I don’t see any output for that above command, I could make below command work which extracts version only by comparing v…
tail the last modified file and monitor for new files in bash
I can tail -f the last modified file using ls –sort=time | head -1 | xargs tail -f but I’m looking for something that would continuously run the first part as well, i.e. if a new files is created while the tail command is running it switches to tailing the new file. I thought about using watch com…
Read and run different command based on each line of file in Bash Linux?
I am completely new to bash scripting. I am trying to write a script in order to read line by line recent_log.txt which has the following content: and then run the command below for each line depend on the suffix. Output should be in another file. each output should have 2 lines space between them. This is my…
Can bash be used to communicate directly with hardware?
I am interested in writing my own tool in bash to act in place of my current network controller (wpa_supplicant) if possible. For example if I want to issue commands in order to begin a wps authentication session with a router’s external registrar, is it possible, without using any pre-built tools, to c…
Get words from positions in string – Bash/Linux
I have the following string that I want to extract name and id from and store them in a variable. This is just an example, the list can be longer but they are separated the same way. The id’s in the string is freepbx and cidlookup, the names are NEWUPDATES and noauth. I’d like them to come out lik…
How to split given text into 3 variables in bash and send to host at port?
I want to write a command that listens to some port (say port 22222), receives a single line of text, and splits that line by spaces into port, host, and text by spaces. The text can have spaces in it too. So, for example, 1234 localhost blah de blah would be be split into 1234 for the port, localhost for