How To Check Linux Server Error Log
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2014 in Commands, File system, LinuxI linux /var/log/messages am a new Linux user. I would like to
How To Check Logs In Linux Server
know where are the log files located under Debian/Ubuntu or CentOS/RHEL/Fedora Linux linux log files explained server? How do I open or view log files on Linux operating systems? Almost all logfiles are located under /var/log directory how to view logs in linux command line and its sub-directories on Linux. You can change to this directory using the cd command. You need be the root user to view or access log files on Linux or Unix like operating systems. You can use the following commands to
How To View Log Files In Linux
see the log files:less commandmore commandcat commandgrep commandtail commandzcat commandzgrep commandzmore commandHow do I view log files on Linux?Open the Terminal or login as root user using ssh command. Go to /var/log directory using the following cd command: # cd /var/log
To list files use the following ls command: # ls Sample outputs from RHEL 6.x server:anaconda.ifcfg.log boot.log-20111225 cron-20131110.gz maillog-20111218 messages-20131103.gz secure-20131027.gz spooler-20131117.gz up2date-20131117.gz anaconda.log btmp cron-20131117.gz maillog-20111225 messages-20131110.gz secure-20131103.gz squid uptrack.log anaconda.program.log btmp-20120101 cups maillog-20120101 messages-20131117.gz secure-20131110.gz swinstall.d uptrack.log.1 anaconda.storage.log btmp-20131101.gz dkms_autoinstaller maillog-20131027.gz mysqld.log secure-20131117.gz tallylog uptrack.log.2 anaconda.syslog collectl dmesg maillog-20131103.gz ntpstats setroubleshoot UcliEvt.log varnish anaconda.yum.log ConsoleKit dmesg.old maillog-20131110.gz prelink spooler up2date wtmp arcconfig.xml cron dracut.log maillog-20131117.gz rhsm spooler-20111211 up2date-20111211 yum.log atop cron-20111211 dracut.log-20120101 messages sa spooler-20111218 up2date-20111218 yum.log-20120101 audit cron-20111218 dracut.loIntroduction Target Audience System Logs Authorization Log Daemon Log Debug Log Kernel Log Kernel Ring Buffer System Log Application Logs Apache HTTP Server Logs CUPS Print System Logs Rootkit Hunter Log Samba SMB Server linux log command Logs X11 Server Log Non-Human-Readable Logs Login Failures Log Last Logins Log what is /var/log/messages Login Records Log System Logging Daemon (syslogd) Configuration of syslogd Echoing Messages to syslogd With Logger Log Rotation Essential Commands
How To Check Log Files In Unix
Getting Started Editing Files Viewing Files Viewing the Beginning of Files Viewing the End of Files Watching a Changing File Searching Files Resources Local System Resources WWW Resources Introduction One of http://www.cyberciti.biz/faq/linux-log-files-location-and-how-do-i-view-logs-files/ the things which makes GNU/Linux a great operating system is that virtually anything and everything happening on and to the system may be logged in some manner. This information is invaluable for using the system in an informed manner, and should be one of the first resources you use to trouble-shoot system and application issues. The logs can tell you almost anything you need https://help.ubuntu.com/community/LinuxLogFiles to know, as long as you have an idea where to look first. Your Ubuntu system provides vital information using various system log files. These log files are typically plain ASCII text in a standard log file format, and most of them sit in the traditional system log subdirectory /var/log. Many are generated by the system log daemon, syslogd on behalf of the system and certain applications, while some applications generate their own logs by writing directly to files in /var/log. This guide talks about how to read and use several of these system log files, how to use and configure the system logging daemon, syslogd, and how log rotation works. See the Resources section for additional information. Target Audience This guide will be simple enough to use if you have any experience using the console and editing text files using a text editor. See the end of this document for some essential commands that may help you find your way around these files if you're relatively new to the command line. System Logs System logs deal primarily with the functioning of the Ubuntu system, not necessarily with additional applications
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the http://stackoverflow.com/questions/12834583/where-can-i-find-error-log-files workings and policies of this site About Us Learn more about http://www.thegeekstuff.com/2011/08/linux-var-log-files Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. how to Join them; it only takes a minute: Sign up Where can I find error log files? up vote 6 down vote favorite 3 Where can I find error log files? I need to check them for solving an internal server error shown after installing suPHP. php logging centos suphp share|improve this question edited Jun 4 '13 at 4:36 Pé how to check de Leao 6,10041629 asked Oct 11 '12 at 7:42 user1010966 781110 1 It depends on your logging settings :) CO –Nemoden Oct 11 '12 at 7:43 1 my server is centos but it doesnt show anything under var/log/httpd –user1010966 Oct 11 '12 at 7:46 Check if error_log path is set in php.ini. If not set it will be usually logged in the web server's error log. –air4x Oct 11 '12 at 7:47 Look for error_log in php.ini, if you use php-fpm, you might also wanted to check error_log in php-fpm conf file –Nemoden Oct 11 '12 at 7:48 error_log shows error_log –user1010966 Oct 11 '12 at 7:52 add a comment| 5 Answers 5 active oldest votes up vote 7 down vote Works for me. How log all php errors to a log fiie? Just add following line to /etc/php.ini to log errors to specified file – /var/log/php-scripts.log vi /etc/php.ini Modify error_log directive error_log = /var/log/php-scripts.log Make sure display_errors set to Off (no errors to end users) display_errors
know where the log files are located, and what is contained in each and every log file. When your systems are running smoothly, take some time to learn and understand the content of various log files, which will help you when there is a crisis and you have to look though the log files to identify the issue. /etc/rsyslog.conf controls what goes inside some of the log files. For example, following is the entry in rsyslog.conf for /var/log/messages. $ grep "/var/log/messages" /etc/rsyslog.conf *.info;mail.none;authpriv.none;cron.none /var/log/messages In the above output, *.info indicates that all logs with type INFO will be logged. mail.none,authpriv.none,cron.none indicates that those error messages should not be logged into the /var/log/messages file. You can also specify *.none, which indicates that none of the log messages will be logged. The following are the 20 different log files that are located under /var/log/ directory. Some of these log files are distribution specific. For example, you'll see dpkg.log on Debian based systems (for example, on Ubuntu). /var/log/messages - Contains global system messages, including the messages that are logged during system startup. There are several things that are logged in /var/log/messages including mail, cron, daemon, kern, auth, etc. /var/log/dmesg - Contains kernel ring buffer information. When the system boots up, it prints number of messages on the screen that displays information about the hardware devices that the kernel detects during boot process. These messages are available in kernel ring buffer and whenever the new message comes the old message gets overwritten. You can also view the content of this file using the dmesg command. /var/log/auth.log - Contains system authorization information, including user logins and authentication machinsm that were used. /var/log/boot.log - Contains information that are logged when the system boots /var/log/daemon.log - Contains information logged by the various background daemons that runs on the system /var/log/dpkg.log - Contains information that are logged when a package is installed or rem