Test if remote TCP port is open from a shell script
I’m looking for a quick and simple method for properly testing if a given TCP port is open on a remote server, from … Read more
shell
Way to create multiline comments in Bash?
I have recently started studying shell script and I’d like to be able to comment out a set of lines in a shell … Read more
Make xargs handle filenames that contain spaces
$ ls *mp3 | xargs mplayer Playing Lemon. File not found: ‘Lemon’ Playing Tree.mp3. File not found: ‘Tree.mp3’ Exiting… (End of file) My … Read more
Check if a file exists with a wildcard in a shell script [duplicate]
This question already has answers here: Test whether a glob has any matches in Bash (21 answers) Closed 3 years ago. I’m trying … Read more
What is /dev/null 2>&1?
I found this piece of code in /etc/cron.daily/apf #!/bin/bash /etc/apf/apf -f >> /dev/null 2>&1 /etc/apf/apf -s >> /dev/null 2>&1 It’s flushing and reloading … Read more
How to set up tmux so that it starts up with specified windows opened?
How to set up tmux so that it starts up with specified windows opened? 22 Answers 22
Using find to locate files that match one of multiple patterns
I was trying to get a list of all python and html files in a directory with the command find Documents -name “*.{py,html}”. … Read more
Going to a specific line number using Less in Unix
I have a file that has around million lines. I need to go to line number 320123 to check the data. How do … Read more
Interactive shell using Docker Compose
Is there any way to start an interactive shell in a container using Docker Compose only? I’ve tried something like this, in my … Read more
Using cURL to upload POST data with files
I would like to use cURL to not only send data parameters in HTTP POST but to also upload files with specific form … Read more