![]() The program that generated the message was dhcpcd, its PID was 3022, and the message was “ eth0: renewing lease of 192.168.198.128“, which indicates that the eth0 adapter is renewing the DHCP lease. In the picture above you can see that the message was generated on November 5, 2014, 20:32:42 on the host suse1. the process number (enclosed in square brackets) of the program that generated the message.įor example, consider the following line:.the program that generated the message.the name of the hosst from which the message came from.Typically, these changes are stored in data structures called log records through an operation called logging. You can also use the tail command to display the last 10 lines of this file:Īs you can see from the output above, each line in this file is a single message recorded by some program or service. Common Log File System Transactional semantics for a database or a journaled file system often require keeping track of changes made to the data and metadata contained in the files or entries. This file is a plain text file, so you can check it using any tool that can examine text files, such as less. This is usually the first place to look at in case of problems. The most important log file in Linux is the /var/log/messages file, which records a variety of events, such as the system error messages, system startups and shutdowns, change in the network configuration, etc.
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