Follow logs live
sudo journalctl -u sshd --follow
Cleanup logs
sudo journalctl --vacuum-size=1K
guest@bastion:~/docs/linux/journalctl$
man linux/journalctl
JOURNALCTL(7)Simon Cornet's docsJOURNALCTL(7)
Journalctl
linux13 wordsJOURNALCTL(7)