![]() If there are any missing details that you would want to refer, please refer to the Official Splunk documentation. This article has been written to cater all specific needs for an individual to refer any specific regular expression that could be used within the context of Splunk software, taking the utmost possible care. This matches with any character that is not part of the character classes as like what are mentioned here ,, ,, ,, , This matches with any of the ASCII characters, in the range mentioned here: 0-127 This matches with any continuous string of alphanumeric characters and underscores. This matches with any character that is defined as a printable character except for those which are defined as part of the space character class This matches the specified regular expression only a specified number of times / occurrences as provided within the flower brackets previously. This matches with the previous OR next character / group (Ch) | (ch) pra matches to “Chopra” or “chopra” Depending of splunk version this is little bit different, but select preferences and under it there is spl and search formatting or something. matches to all ASCII letters ranging amongst a to z, but just the lower case letters matches to all ASCII letters ranging amongst A to Z, but just the upper case letters matches to any character but not any positive integers ranging from 0 to 9. Just click on your name top of the screen. The open and closed square brackets always match with a range of characters (alphabets, numbers) Example: lain matches “splain”, “plain” + matches to any of the positive integers available in the string where the regular expression will be applied. Hi, as I said, the only way I can help you is that you share some samples (not one) of your logs: eventually mask sensible contents but don't change the log structure. Example: (Week)* matches to any of the following – “Week1”, “Week2” or “Week3” The open and closed parenthesis always match a group of characters. ![]() Example: Splunk* matches with “Splunk”, “Splunkster” or “Splunks”. How can I extract the string beginning with 'Memory viol' till the end of line The string is one line only, but may be much longer with any characters. This character matches with any possible character, as it is always used as a wildcard character. I have lines like this: 110:33:13.978+0100 P-18679 T-0 I Usr 2: (49) SYSTEM ERROR: Memory violation. Example: Splunk? matches with the string “Splunk?” This character is used to escape any special character that may be used in the regular expression. Rex expression multi line with line break. ![]() Example: Splunk+ matches with “Splunk” or “Splunkkk” but not with “Splun” Finally, try this in splunk with YOUR version of the regex until it works for your data. This character when used along with any character, matches with 1 or more occurrences of the previous character used in the regular expression. This character when used matches 0 or 1 occurrence of the previous character specified in the regular expression. ![]() Example: Splunk* matches both to these options “Splunk”, “Splunkkkk” or “Splun” This character tries to match 0, 1 or more occurrences of the previous character specified on this regular expression. ![]()
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