I am am new to Linux and have a question about scripts. I am interested to know how you create a new directory and copy all the files (with .txt extension) from the existing directory into it? I am familiar with the mkdir method but I am having trouble when trying to execute it within a script. I have tried
Tag: linux
Writing to Linux device driver causes infinite loop
I have been writing a kernel space device driver that can be read from and written to from user space. The open, read, release operations all work perfectly. The problem I am having is with the user-space code that should access the device driver and and write something to it. The user-space program writes to…
cpio is not working properly in repacking initrd.lz for live
If I unpack initrd.lz and then repack it without making any changes, then replace it with my new initrd.lz in Casper directory for live CD. It is structed. While packing of initrd I got a warning message as below: cpio: ./usr/share/plymouth/themes/text.plymouth: Cannot stat: No such file or directory. Finally…
Save multiple instances of an image downloaded by wget
What it does is that the url on top is to a camera taking photos every minute. My code downloads that image, saves it and puts it in a html file every 60 seconds. So what I am trying to do is save the newest image in spy.html and the older ones would iteration through the loop until it reaches
How to validate the number of arguments (mandatory and optional) in a shell script?
I am having trouble validating my script arguments. I am trying to achieve 5 mandatory arguments and 2 optional arguments to my script. Here is what I have tried so far. The problem is validating the total number of arguments to this script as I can have a total of 5 or 7 arguments. Providing -a additional -c…
What is contained in code/internal sections of JCMD?
Dimensioning a docker container for a JVM based service is tricky (as we all know). I’m pretty sure we have slightly under-dimensioned a container and want to clear up a few questions I have relating to specific jcmd (Native Memory Tracker) outputs that we see when monitoring. Questions: Are Direct Byte…
kali linux pip install paramiko get ValueError
when I install paramiko with pip get error ValueError: Unable to determine SOCKS version from socks://127.0.0.1:1080/ This is the detailed error code I get: And I don’t what to do then I try to upgrade pip get error prompt code I use the command get the prompt code what should I do? Answer if you don…
Error while creating react-native app in linux
I have installed node and checked it as the node js docs suggested by doing node -v and npm version and I got the same expected results as they showed in the docs But I couldnt run npm install -g react-native-cli This is the error that I get : Answer You need to use Or run your npm install as
Error “syntax error near unexpected token ‘(‘” in Bash script when selecting files
Running this script, bash ./cleanup.bash, Gives the error: cleanup.bash: line 10: syntax error near unexpected token ‘(‘ cleanup.bash: line 10: ‘rm -rf !(composer.json|.git)’ But if I run in in the terminal directly, there aren’t any problems: I tried stripping out all other line…
What does “~[]” do?
I saw the following line of code here . I don’t understand, what does empty array script([]) do? Also, What is the purpose of ~[] in C? Answer The linked program seems to be logging its actions in some invented semi-formalized language. This logging “language” is not C. The string literal in…