This character when used along with any character, matches with 1 or more occurrences of the previous character used in the regular expression.Įxample: Splunk matches with “Splunk” or “Splunkkk” but not with “Splun” This character when used matches 0 or 1 occurrence of the previous character specified in the regular expression. This character tries to match 0, 1 or more occurrences of the previous character specified on this regular expression.Įxample: Splunk* matches both to these options “Splunk”, “Splunkkkk” or “Splun” We will try to be as explanatory as possible to make you understand the usage and also the points that need to be noted with the usage. ![]() These regular expressions are to be used on characters alone, and the possible usage has been explained in the example section on the tabular form below. Enroll for Free " Splunk Training" Splunk regex cheat sheet: Learn how to use Splunk, from beginner basics to advanced techniques, with online video tutorials taught by industry experts. For any further references, it is very much required for you to access the official Splunk documentation or the cheat sheet that they provide for regular expressions as such. This has been carefully compiled with all the necessary functions being considered, hence you can use it without any doubts. (I edited your question on the assumption that you had pasted the literal string without editing.The following article should be your one-stop-shop for all the regular expressions that you would use in Splunk software for any purpose, be it for your evaluation or even to perform any search related operations. However, I'm also not sure that the search you provided in your question was correct, as I don't know if you typed extra backslashes in your search string to make it display right, or if you pasted in unchanged. I wonder what version of Splunk you're on and if there was a bug that was fixed. The resulting regex that is actually applied in the above examples then are ^mydomain\x5c and ^mydomain\\ ![]() Note that in the Splunk search string, backslashes that you want to have as part of a regex must themselves be escaped with a backslash. ![]() Returning g as myname, so I'm not sure why you have the problem. So this works: | stats count | eval f="mydomain\myname" | eval g=replace(f,"^mydomain\\x5c","")īut in addition, this works perfectly for me: | stats count | eval f="mydomain\myname" | eval g=replace(f,"^mydomain\\\\","") See: : \x, \000 character whose ordinal is the given octal number Splunk regexes are PCRE, which does allow you to specify a character by codepoint. It would be nice if Splunk developers included "chr(ascii-code)" command, when any character in the search string could be replaced with ASCII code at places, where the escaping nonsense happens. It gets broken thinking that I am escaping the parenthesis. Same thing happens if I try to extract "myuser" from the username with rex: rex field=_raw "^client\\\\(?.*)" Statement "\\" should escape \ sign and not double quotes. How can I get rid of the damn backslash? I am surprised that splunk matches from the right side instead of from the left. ![]() When I take "\" out of the statement: source="/var/log/iis" | eval username=lower(username) | eval username=replace(username,"mydomain","") | stats count by username | sort -count Gets broken with error message, because splunk thinks that I am escaping double quotes, instead of \ sign. Search: source="/var/log/iis" | eval username=lower(username) | eval username=replace(username,"mydomain\\\\","") | stats count by username | sort -count I need to remove "mydomain\" string from the username. It screws up the results for "stats", because myuser and mydomain\myuser are taken as two different users. Sometimes our users login to our web application using username: "myuser" or "mydomain\myuser".
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