Wtmp not updating

Posted by / 08-Oct-2019 13:04

Wtmp not updating

In addition to the syslog, systems also have a variety of service, environment, and application logs that record information about the machine and its operation.Although parsing and extracting the content of the log files for information can be time consuming and sometimes complex, the wealth of information in those logs is difficult to ignore.For example, you can write all the standard information out to a file.But for critical messages, where administrators need the information right away, these messages can be sent immediately to the console.On most UNIX and Linux systems the majority of the logs are located in /var/log.For example, Listing 1 shows a list of logs located on a Gentoo Linux system. Linux /var/log directory contents $ ll /var/log total 3312 -rw-r----- 1 root root 8218 2007-11-03 dmesg -rw-rw---- 1 portage portage 650111 2008-02-02 -rw------- 1 root root 24024 2007-11-05 faillog -rw-r--r-- 1 root root 386032 2007-09-28 drwxr-xr-x 2 root root 4096 2007-11-03 iptraf/ -rw-r--r-- 1 root root 292292 2008-02-03 lastlog -rw------- 1 root root 1346931 2008-02-03 messages drwxr-xr-x 2 root root 4096 2006-08-30 news/ drwxr-xr-x 3 root root 4096 2007-09-28 portage/ drwxrwx--- 2 root portage 4096 2007-11-03 sandbox/ drwxrwx--- 2 snort snort 4096 2007-10-13 snort/ -rw-rw-r-- 1 root utmp 496896 2008-02-03 wtmp -rw-rw-rw- 1 root mc 61189 2007-06-10 Xorg.0-rw-rw-rw- 1 root root 61189 2007-06-10 Xorg.0old $ ls -al /var/adm total 230 drwxrwxr-x 9 root sys 512 Feb 3 . drwxrwxr-x 5 adm adm 512 Feb 2 acct -rw------- 1 uucp bin 0 Jan 12 aculog drwxr-xr-x 2 adm adm 512 Feb 2 exacct -r--r--r-- 1 root root 2856 Feb 3 lastlog drwxr-xr-x 2 adm adm 512 Feb 2 log -rw-r--r-- 1 root root 69065 Feb 3 messages drwxr-xr-x 2 root sys 512 Feb 2 pool drwxrwxr-x 2 adm sys 512 Feb 2 sa drwxr-xr-x 2 root sys 512 Feb 2 -rw-rw-rw- 1 root bin 0 Jan 12 spellhist drwxr-xr-x 2 root sys 512 Feb 2 streams -rw------- 1 root root 93 Feb 3 sulog -rw-r--r-- 1 root bin 3720 Feb 3 utmpx -rw-r--r-- 1 adm adm 29760 Feb 3 wtmpx In addition, some non-system-level messages and information are written into logs located within /var/log (Listing 3).For example, on Solaris, by default, mail debug entries are written into /var/log/syslog. Additional logs in /var/log on Solaris $ ls -al /var/log/ total 48158 drwxr-xr-x 7 root sys 512 Feb 3 . -rw------- 1 root sys 0 Jan 12 authlog -rw-r--r-- 1 root other 27 Feb 2 brlog drwxr-xr-x 2 root root 512 Feb 2 gdm drwxr-xr-x 2 root sys 512 Feb 2 pool -rw-r--r-- 1 root sys 24480410 Feb 3 drwxr-xr-x 2 root sys 512 Feb 2 swupas -rw-r--r-- 1 root other 635 Feb 2 -rw-r--r-- 1 root sys 3967 Feb 3 syslog drwxr-xr-x 3 root sys 512 Feb 2 webconsole drwxr-xr-x 2 root sys 512 Feb 2 xen -rw-r--r-- 1 root root 66171 Feb 3 Xorg.0-rw-r--r-- 1 root root 66256 Feb 3 Xorg.0old Of course finding the files is the least of the issues.

Messages are also identified by the service that raise the issue (for example, mail, dhcp, kernel), and a class indicating the severity of the message.

The log file can provide hints on potential problems, faults, security lapses and, if used correctly, can even help provide warnings on load and capacity of your servers.

The location of the various log files varies from system to system.

Depending on the UNIX variants, some logs may be littered about in other places, but there has been a significant attempt to standardize on log file locations to one of the directories already mentioned.

Log types fall into two categories, text log files that contain messages and information in a simple text format, and files that are encoded in a binary format.

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For example, all UNIX and Linux machines use the syslog, a generic logging system that is used by the operating system and applications and services to log information.