Performance System Discoveries for 10/10/24

Details: Written by: Charles Thompson (Webmaster); Category: Linux System Purposing, Production, and Dedicated Hosting; Published: 10 October 2024; Hits: 114

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Accidently found 2 secrets of UNIX flavor MacOS "Darwin" and Plesk Linux servers

zsh: Pressing Ctrl + SHIFT R opens a history search to re-apply the same command against the shell.
A 'mesg' command does the talk daemon. This was OG stuff from Linux, from going back to when I was a child.
Also knew about utmp from Linux, maybe wtmp too.
This file was the history of login for telnet, but now for SSH and via 'w' and 'who'.
So, I went on my friend Dan's Linux server and pulled out 'utmpdump' which I also discovered. When applied with file "/var/log/wtmp" in arguments it would show some possibly useful information fields perhaps about login history. This is a query portal for perhaps LDAP scripts or databases?

Information

ℹ️ Use the 'last' command to use the wtmp of user logins.

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