Understanding how to fix or resolve an issue is often the easy part of system administration. Understanding how to "identify" the cause of an issue is usually much more difficult.
When working with Linux servers, specifically Linux email servers, it is important to always review log files for possible "clues". When reviewing log files, there are two Linux commands that can help dramatically: egrep and grep
egrep (extended grep) allows you to search a file for a pattern using full, regular expressions. This includes metacharacters such as < and >.
grep allows for basic regular expression searching in a file.
egrep (extended grep) allows you to search a file for a pattern using full, regular expressions. This includes metacharacters such as < and >.
grep allows for basic regular expression searching in a file.
This article will show some of the more common methods for troubleshooting Insight Server Postfix log files.
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