Documentation by Black Sheep Research

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.

[[useful:contents|Contents Page]]

====== Linux Commands ======

===== Installing a GPG key =====

Example:

     wget -O- https://download.webmin.com/jcameron-key.asc | sudo gpg --dearmor | sudo tee /usr/share/keyrings/jcameron-key.gpg > /dev/null 2>&1 
     
Then need to edit the sources.list file to look something like:

     deb [signed-by=/usr/share/keyrings/jcameron-key.gpg] https://download.webmin.com/download/repository sarge contrib

===== Change permissions for whole directory structure =====

For directories:

    find /desired_location -type d -print0 | xargs -0 chmod 0755
    
For files:

    find /desired_location -type f -print0 | xargs -0 chmod 0644

Adapt as required.

===== Delete all files with given pattern =====

     find . -name '*altauserpoints*' -print0 | xargs -0 -P0 rm
     
Adapt as required.

===== Make a change in every file in a directory  =====

     sed -i 's/foo/bar/g' *
     
To make the change through a whole directory tree:

     find ~/public_html/my_website/pages -type f -exec sed -i 's/2017/2018/g' {} \;
     
===== Bluetooth =====

Using this from the command line seems to do more than the GUI:

     bluetoothctl