TLDR Must run the .sh script with source instead of the script solely source your-script.sh and not your-script.sh Details sh is not the same as bash (although some systems simply link sh to bash, so running sh actually runs bash). You can think of sh as a watered down version of bash. One thing that … Read more
If you want to count the number of lines that are different use this: diff -U 0 file1 file2 | grep ^@ | wc -l Doesn’t John’s answer double count the different lines?
yet another solution uses tr: echo $testVar | tr -d ‘\r’ cat myscript | tr -d ‘\r’ the option -d stands for delete.
In windows, to list only directories: dir /ad /b /s to list all files (and no directories): dir /a-d /b /s redirect the output to a file: dir /a-d /b /s > filename.txt dir command parameters explained on wikipedia
In-place truncation To truncate the file in-place with sed, you can do the following: sed -i ‘50001,$ d’ filename -i means in place. d means delete. 50001,$ means the lines from 50001 to the end. You can make a backup of the file by adding an extension argument to -i, for example, .backup or .bak: … Read more
vim -c <command> Execute <command> after loading the first file Does what you describe, but you’ll have to do it one file at a time. So, in a windows shell… for %a in (A,B,C,D) do vim -c “:g/^\s*$/d” -c “<another command>” %a.txt POSIX shells are similar, but I don’t have a machine in front of … Read more
With NGINX Docker image Apply envsubst on template of the configuration file at container start. envsubst is included in official NGINX docker images. Environment variable is referenced in a form $VARIABLE or ${VARIABLE}. nginx.conf.template: user nginx; worker_processes 1; error_log /var/log/nginx/error.log warn; pid /var/run/nginx.pid; events { worker_connections 1024; } http { server { listen 80; location … Read more
Open exists now, use that. 🙂 Install with: $ npm install –save open Use with: const open = require(‘open’); // Opens the image in the default image viewer (async () => { await open(‘unicorn.png’, {wait: true}); console.log(‘The image viewer app closed’); // Opens the url in the default browser await open(‘https://sindresorhus.com’); // Specify the app … Read more
The number of seconds per day are fixed with Unix timestamps. The Unix time number is zero at the Unix epoch, and increases by exactly 86400 per day since the epoch. So it cannot represent leap seconds. The OS will slow down the clock to accommodate for this. The leap seconds is simply not existent … Read more