multitail

Extension of tail. More information: https://manned.org/multitail.

• 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 'path/to/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 path/to/mergefile -I path/to/file1 path/to/file2 path/to/file3 path/to/file4