Suppose I have a folder: /usr/lib/x86_64-linux-gnu/wxcrafter containing some library files and their corresponding symlinks, e.g: /usr/lib/x86_64-linux-gnu/wxcrafter/lib1.so.0 -> /usr/lib/x86_64-linux-gnu/wxcrafter/lib1.so.0.0.0 /usr/lib/x86_64-linux-gnu/wxcrafter/lib2.so.0 -> /usr/lib/x86_64-linux-gnu/wxcrafter/lib2.so.0.0.0 I want to make a copy of wxcrafter to a new location codeblocks, preserving the relative location of the symlink targets: usr/lib/x86_64-linux-gnu/codeblocks/lib1.so.0 -> /usr/lib/x86_64-linux-gnu/codeblocks/lib1.so.0.0.0 /usr/lib/x86_64-linux-gnu/codeblocks/lib2.so.0 -> /usr/lib/x86_64-linux-gnu/codeblocks/lib2.so.0.0.0 How do I do this on the command line, given that there
Tag: shell
Echo only valid user
Bash newbie question: I’d like to have this script echo out only users from a given list that are valid user IDs, and not echo the invalid ones. Here’s what I have so far: Instead, it is echoing out the results of ‘id’ as well as the text “is not valid user ID” Ideally, it’d echo results like: Your help
Does all linux users are present on /etc/passwd? [closed]
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How to run command CTRL+Z in Shell?
I have a Node progress. I want to auto-start it and keep it in background via a shell script. The way I keep background progress is press crtl+Z after run npm run start, then run bg && disown. Now I’ve got a problem: How to process this crtl+Z command in Shell script? Answer Another way to run a script in
Linux bash to iterate over apache access_log files and send mail
I need a linux bash script which send me an email if any results appear in searches made in the apache logs. I have a very simple method (sentence) to look into SQL Injection attacks, which simply searches for some keywords used in SQLi. Is this: So now I would like to be able to launch it in several access_log
Use a modified variable in bash script, trying to change git branch programatically
I’m playing around with my custom commands, and I’m currently trying to change a remote Git branch programatically using bash. The idea is this function will try to find the branch issue_X, if it does it switches, otherwise it creates and sets the remote origin. The problem is git branch -u origin issue_${1} I don’t know how to do this,
Is every command handled differently in input redirection in a shell (linux)?
For example wc -l filename would print out for example “3 filename”, while wc -l < filename would print out only “3” disregarding “filename”. This means there must have been some program that got rid of “filename” with the addition of input redirection “<“. Also that means input redirection handles every command differently; such as “cat filename” would print out
No cursor motion capability occurs when startup linux script execute minicom script with at commands
I have created a startup Linux script for a board that runs Debian jessie Armbian 8.1. I need at startup to run at command in a modem attached to it via USB interface. I’ve put the script inside rc.local: In the folder Script I have a script: The at_command contains: The issue is that when I run the script manually
Use bash -s with other arguments
I have install.sh script which is located in server. I want to write one line code to download and run the script. Everything works fine until I am trying to set arguments It can’t recognize ‘-p’ as an argument but ‘abc’ can. How to set arguments in this situation starting with ‘-‘ or ‘–‘ signs? Answer Start your argument list
Why does flock removes existing text from a file?
So, I am trying to get an exclusive lock on a text file using Flock and a line of text to that file however while doing so it removes whatever text was there earlier. So if the file had let’s say and after running the script I am expecting something like instead, all I get is why would it behave