September 2014 – Juzhax Technology

Finding all files containing a text string on Linux or Mac

juzhaxPublished 2014-09-19Last updated 2020-03-201 minute read

I need to find some string in all folders. grep -rnw ‘./folder/’ -e “search-text” Note: -r is recursive -n is line number -w stands match the whole word

Fastest way to rename filenames with space to dash in linux

juzhaxPublished 2014-09-101 minute read

I want to mass rename hundred of filenames like filename 001.jpg to filename-001.jpg … … … filename 099.jpg to filename-099.jpg I use this command to rename all in few seconds in my MacBook Pro. I think it is fine to run in any linux. for f in *\ *; do mv “$f” “${f// /-}”; done

Show Image Size in Terminal or Shell

juzhaxPublished 2014-09-081 minute read

The easiest way to show the file size in Terminal in Mac or Linux. ustins-MacBook-Pro:jpg juzhax$ file 001.jpg 001.jpg: JPEG image data, EXIF standard Justins-MacBook-Pro:jpg juzhax$ identify 001.jpg 001.jpg JPEG 720×468 720×468+0+0 8-bit sRGB 59.8KB 0.000u 0:00.009 Justins-MacBook-Pro:jpg juzhax$

command c expects followed by text error in Mac

juzhaxPublished 2014-09-061 minute read

You received error from the sed command in Mac, because the argument in mac is different. If you type in Mac terminal, you may receive error like this Justins-MacBook-Pro:2 juzhax$ sed -i ‘s/old_text/new_text/g’ example.txt sed: 1: “config.php”: command c expects \ followed by text The first argument should be the extension of the backup file. Continue reading “command c expects followed by text error in Mac”