改变前测试:
# sudo date
# journalctl -r 或 journalctl -n
Feb 11 11:24:48 TrustGate.com sudo[110462]: pam_unix(sudo:session): session opened for user root by root(uid=0)
Feb 11 11:24:48 TrustGate.com sudo[110462]: pam_unix(sudo:session): session closed for user root