Find user login history – last and lastb commands in Linux
1.0 last and lastb The last command gives a chronological list of user logins in a Linux system for a period of time. The lastb commands gives a similar list…
Dovecot: imap Error: open (/var/mail/username) failed
While configuring mail on a Ubuntu Linux server running the Postfix mail server and Dovecot IMAP server, the following errors were observed in the mail log files, dovecot: imap(user1): Error:…
Linux process execution time
Execution time A process has an execution time associated with it. The execution time comprises of two parts, the user time and the system time. The user time is the…
Remote Display With the X – Window System
X - Window system is a network-transparent window system. X11 server is the display server that manages the output on the bit-mapped display hardware. An application (or client) does the…