tail: cannot watch `/var/log/messages': No space left on device

Solution:

$ sudo su
# sysctl fs.inotify.max_user_watches
fs.inotify.max_user_watches = 8192
#
# sysctl -w fs.inotify.max_user_watches=16384
fs.inotify.max_user_watches = 16384

Im not sure why we need to higher the

Reference:
tail-cannot-watch-varlogmessages-no

kernel-inotify-watch-limit-reached