How To grep n Lines Before In Solaris


I like to show how to get the n lines before a pattern search using grep in Solaris. First of all, Solaris grep command not have a option to get the lines before or after from a match. You must use ggrep compliance to unix standard. Let me see show a pair of examples;

Test 1, this comamnd show the four previous lines from match ‘ORA-00313’;

cat alert_db.log | /usr/sfw/bin/ggrep -B 4 ORA-00313

Test 2, this command show the previous line from match ‘ORA-00313’;

cat alert_db.log | /usr/sfw/bin/ggrep -B 1 ORA-00313




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