How do I completely wipe my hard drive in Ubuntu?

There are several programs to do that:

1. wipe
2. srm
3. dd
4. shred
5. scrub

https://linuxhint.com/completely_wipe_hard_drive_ubuntu/

xwininfo

 The command 'xwininfo' gives you information on the window that you click on.

Special man command

If you use less as pager for man you can try

LESS="+/^\s+-b" man wget

where

1. + symbol to execute next operation after less has opened
2. / command to start search
3. ^\s+-b regexp to match -b from start of line

So if you like you can arrange the apropriate function for shell

function rman {
#USAGE: rman programm.name option.to.search (with "-" symbol)
LESS="+/^\s+$2" man "$1"
}

and add it into ~/.bashrc for example.

https://unix.stackexchange.com/questions/180639/is-there-way-to-see-man-document-only-for-specified-option-of-a-command 

 

SimpleHTTPServer

python3 -m http.server 8080

1. go to the relevant directory in your terminal and type this command
2. type ip and find the 192.168. etc.
3. go to the other computer and type into the browser: 192.168.x.x:8080

gunzip all files recursively in a target directory?

For zip-files:
find <path_of_your_zips> -type f -name "*.zip" -exec unzip {} -d <out> \;

https://askubuntu.com/questions/620571/how-do-i-gunzip-all-files-recursively-in-a-target-directory

Gdebi of deb files

 Use:

gdebi-gtk

Screen dimensions

 xrandr | grep '*'