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Tag: linux

Strange public key in authorized_keys

I’m using Linux VPS as a web server (haproxy+nginx+java+mysql+memcached+redis+solr), for security reason, I disabled password login and using key instead. These days, I can’t login to my server, when using VPS console to login, I found some strange public key in the /root/.ssh/authroized_keys, and…

Unzipping bz2 file

I have the following command to open a tbz file: The compressed file is about 15 GB and when it is expanded it is about 500GB or so. This operation on an ec2-4x-large operation takes roughly 1h40m. Is there a way to optimize this operation? What would be the fastest way to do the above operation? Answer A cou…

log text parsing in linux

I need to select a text from the log and store the field has a column to the new file. For example below is the log format Want to print the output like below i have used awk to print as column wise How to get the value using like, the id as key and inside the double quotes is

Preserve timestamp when editing file

I want to preserve the timestamp of the files I’m editing in a for loop The issue is I need to get a formatted date string from the file so that I can do touch -r to revert the files date back once the loop has completed. stat is not giving the me the format I need. Required Format: YYMMDDhhmm

How can i execute comm Linux command in Python

I want to extract lines from File1 which are not present in File2 File1 File2 so the output should be: One possible command in bash is: And it works perfectly well in bash, but I don’t know how correctly to implement in Python. I’ve tried with And is not working. Any hint? Answer If you must use a…

Curses snake game not removing cells in linux os

It’s code from a curses tutorial that I’ve been using to get a grasp of it but even though I’ve checked the code multiple times, it’s still not removing the old cells. The guy that wrote the code is on a mac and I’m using linux so would that be a problem? Answer The problem seems…

Use of MONO_IOMAP to cope with a hard-coded file path?

I’m trying to get a Windows .NET binary to run under Linux using Mono. The app runs fine on Windows. It presently fails under Mono because it can’t find a file with a hard-coded path. For testing, I’m using a Fedora 23 VirtualBox VM running under Windows 7. All the files are present on the V…