multitail

Extension of tail. More information: https://www.vanheusden.com/multitail/examples.php.

Tail all files matching a pattern in a single stream:

multitail -Q 1 '{{pattern}}'

Tail all files in a directory in a single stream:

multitail -Q 1 '{{directory}}/*'

Automatically add new files to a window:

multitail -Q {{pattern}}

Show 5 logfiles while merging 2 and put them in 2 columns with only one in the left column:

multitail -s 2 -sn 1,3 {{mergefile}} -I {{file1}} {{file2}} {{file3}} {{file4}}