Log folder log file contents in Linux

/var/log/messages -Includes overall system information, which also contains logs during system startup. In addition,mail,cron,daemon,Kern and Auth and other content are also recorded in the var/log/messages log.

/VAR/LOG/DMESG -Contains kernel buffering information ( Kernel ring Buffer ). When the system starts, many hardware-related information is displayed on the screen. You can view them with DMESG.

/var/log/auth.log -Contains system licensing information, including user login and use of the permissions mechanism.

/var/log/boot.log -Contains the log at system startup.

/var/log/daemon.log -Contains various system daemon log information.

/var/log/dpkg.log – including installation or dpkg command to clear the log of the package.

/var/log/kern.log – Contains logs generated by the kernel to help resolve issues when customizing the kernel.

/var/log/lastlog -Record The most recent information for all users. This is not an ASCII file, so you need to use the lastlog command to view the content.

/var/log/maillog/var/log/mail.log -Contains the log information of the system running e-mail server. For example,sendmail log information is all sent to this file.

/var/log/user.log -Logs of all levels of user information are logged.

/var/log/xorg.x.log -From X log information.

/var/log/alternatives.log – Updates to the replacement information are recorded in this file.

/var/log/btmp – Log all failed login information. Use the last command to view the btmp file. For example, "last-f/var/log/btmp |more".

/var/log/cups -logs that involve all printed information.

/var/log/anaconda.log -In the installation Linux , all installation information is stored in this file.

/var/log/yum.log -Includes use Yum Install the package information.

/var/log/cron -Whenever Cron When a process starts a job, the relevant information is recorded in this file.

/var/log/secure -Contains authentication and authorization information. For example,sshd will record all information (including failed logins) here.

/var/log/wtmp or /var/log/utmp -Contains login information. Use wtmp to find out who is logging into the system, who uses the command to display this file or information, and so on.

/var/log/faillog – Contains user logon failure information. In addition, the error login command is also recorded in this file.

In addition to the above Log file, /var/log is also based on a system-specific application that contains the following subdirectories:

/var/log/httpd/ or /var/log/apache2 -Contains server access_log and error_ Log information.

/var/log/lighttpd/ -Includes Light HTTPD of the Access_log and the Error_log .

/var/log/mail/ – This subdirectory contains additional logs for the mail server.

/var/log/prelink/ -Includes . so file is PreLink the modified information.

/var/log/audit/ -Contains the Linux Audit Daemon stored information.

/var/log/samba/ – Contains the Samba the stored information.

/var/log/sa/ -Contains daily by Sysstat Package Collection of SAR file.

/var/log/sssd/ – for Daemon security services.

Log folder log file contents in Linux