One liners

sed

Replace all enters with spaces with sed.

sed ':a;N;$!ba;s/\n/ /g'

Replace all uppercase letters with lowercase with sed.

sed -e 's/\(.*\)/\L\1/'

The same with tr

tr '[:upper:]' '[:lower:]'

Powershell

One liner powershell command to uninstall the application 'Linphone'.

C:\windows\system32\WindowsPowerShell\v1.0\powershell.exe -command "& {$app = Get-WmiObject -Class Win32_Product -Filter \"Name = 'Linphone'\"; $app.Uninstall() }"