how to grep logs between two timestamps in linux

Grep doesn't parse timestamps, and neither will your AWK script. Problem - Want to grep gzip files. All of the matching lines are displayed for each of the search terms. By default, dmesg use a timestamp notation of seconds and nanoseconds since the kernel started. Thirdly, it was written overnight to satisfy a particular need. If that doesn't return results, then you're missing something from your log format. I am using the following command: The first two are bang on; the third is slightly off. The space between Y and l, is the culprit I had given this space to accomodate 2 digit hour. You can grep multiple strings in different files … 0 down vote favorite 1 I'm trying to extract all logs between two time-stamps. Linux zgrep FAQ: How do I use the Linux zgrep command? Etc. In FreeBSD, you can install the devel/pcre port which includes pcregrep, which supports PCRE (and look-ahead/behind).Older versions of OSX used GNU grep, but in OSX Mavericks, -P is derived from FreeBSD's version, which does not include the option. The -L (files without match) option does just that. This should show all files modified within the last 7 days. Some lines may not have the time-stamp, but I want those lines to be included - I want every line that falls under two time stamps to be included in the extracted logs. Otherwise, it does nothing..(as happening with me till now) Your script worked because there are 2 spaces between the year and the hr in the log file that you have shown: 2013 5 and so it could match exactly. We got two log lines that matched. 295 1 1 gold badge 6 6 silver badges 16 16 bronze badges. the values in xml file is as follow... # cat /tmp/checkdate.log It dates from 1974 and is still going strong because we need what it does, and nothing does it better. This really is the tip of the iceberg for grep and what it can do for you in processing your logs. I am looking for some help in assembling a proper command to help me narrow down files from the year 2010 based on its timestamp. Grep is a powerful utility available by default on UNIX-based systems. I have a log and I want to print all the lines from the log between two dates 02/04/2015:14:23:00 and 02/04/2015:14:23:59. linux bash. how to grep the logs for two particular timestamp, Hi, could anyone help me out how to write a script, to grep the two timestamp from a particular file, so that it will list out all the logs between th | The UNIX and Grep lines between last hour timestamp and current timestamp. Output to file abc.txt should be : 20120613,20120614,120120615,20120616 Active 3 years ... You should be able to grep the April and May lines, assuming the format is mm/dd/yyyy with this expression. We know there’s going to be quite a few, so we pipe the output into less: This lets you page through the file listing and to use less's search facility. This means someone used a program to display the contents of the file or read some values from it. To deal with that, I wrote a PHP script that reports log file timestamp ranges and can also extract a chunk by timestamp range, using any date or time format you like (it doesn't need to match the log file's timestamp format). Ken Thompson had extracted the regular expression search capabilities from the ed editor (pronounced ee-dee) and created a little program—for his own use—to search through text files. Then extract the test between these two lines. atime – access time 2. mtime – modify time 3. ctime – change time Run the following commands to read the log file when you have the requirement to read the files between two timestamps with in a day. If we pipe the output from grep into wc and use the -l (lines) option, we can count the number of lines in the source code files that contain “ExtractParameters”. The log file name looks like: Some lines may not have the time-stamp, but I want those lines to be included - I want every line that falls under two time stamps to be included in the extracted logs. Of course, you can pipe input to grep , pipe the output from grep into another program, and have grep nestled in the middle of a pipe chain. Here we’re searching in the current directory “.” and any subdirectories: The output includes the directory and filename of each matching line. We’ve got a symbolic link in this directory, called logs-folder. e.g: between time range 04:15:00 to 05:15:00. Find the number of the first line matching your starting pattern. Thanks in advance. special parameters: To search through nested directories and subdirectories, use the -r (recursive) option. I am trying to print the dates that falls between 2 date variables into a file. N 2011-07-27 12:50:56.402353 979608 N 2011-07-27 12:50:58.012015 979622 N 2011-07-27 12:50:58.012078 979623 My requirement is to find the entries matching timestamp from now to 30 minutes before. Hi, i would really appreciate any help anyone can give with the following info. Hi I am new to scripting and I have a requirement to grep a value from large numbers of xml files and see if this value exist then I want to check the date and see if it falls between two dates (eg: today and feb 17), then print the name of file. I need to search through the lines and get the lines that lie between two specific dates and times. We’re going to search for lines that end with “00.”. grep failure /var/log/secure -c. Grep will return a number like this: 12. To match the end of the line, use the “$” regular expression operator. Find the number of the last line matching your ending pattern. you want all logs with hour between 8 and 11, but you don't know if there is a log entry at time 2012-03-06 08:00:00 or anything for that hour at all). I will follow up with part two in the coming days where I will cover more complex patterns and some shortcuts. For something where this is just one chunk and you can just remove one set of `pre` and `/pre` matches, not a big deal. And to include lines from before and after the matching line use the -C (context) option. (7 answers) Closed 4 years ago. It tells grep to match any one of the characters contained within the brackets “[].” This means grep will match either “kB” or “KB” as it searches. To have this rendered in a more human-friendly format, use the -H (human) option. grep is a terrific tool to have at your disposal. To follow the changes to two or more files, pass the filenames on the command line: tail -f -n 5 geek-1.log geek-2.log. Get lines between two timestamps from a file. I was trying to search for string 'Cannot proceed: the database is empty' in file out.log from bottom to top only (as log file is quite huge and everyday it appends the log at last only) during time-stamps yesterday 10:30 pm to today 00:30 am only. which works. sudo dmesg -H. This causes two things to happen. This question already has answers here: How do I use shell variables in an awk script? N 2011-07-27 12:50:56.402353 979608 N 2011-07-27 12:50:58.012015 979622 N 2011-07-27 12:50:58.012078 979623 My requirement is to find the entries matching timestamp from now to 30 minutes before. N6.2009-12-01-10-05-02.console.log.tar.gz Hi, could anyone help me out how to write a script, to grep the two timestamp from a particular file, so that it will list out all the logs between the particular timestamp I have a pattern of log: servicename operationname starttime endtime eg., servicename1 operationname1 01:11:11 12:11:12 servicename2 operationname2 14:12:11 22:11:32 servicename3 operationname3 12:11:11 22:11:11 The access timestamp is the last time a file was read. You're going to need something more intelligent. Thanks... Hi I am working on the script parsing specific message "TEST" from multiple file. Build up the regular expression bit by bit. How to read “N’ number of lines after specific Pattern. Ask Question Asked 4 years, 8 months ago. zgrep -a --text... Dear All, grep between two files. grep -A 5 ERROR log.txt. Ravikanth Ravikanth. The result is passed to the shell as a return value from grep. You can grep multiple strings in different files … This means someone used a program to display the contents of the file or read some values from it. Dave is a Linux evangelist and open source advocate. The problem with this approach is that there has to be a line in the log file with that timestamp. So basically I have a log file and each line in this log file starts with a timestamp: Code: MON DD HH:MM:SS SEP 15 07:30:01. With the next command, we’re piping the output from ls into grep and piping the output from grep into sort . The awk approach above would work for such cases (i.e. If your time stamp format is different, you can adjust the regular expression passed to … If the log files for the task above all had a naming convention of myoutput_YearMonthDay.log (i.e. This is also … So far I have something that saves the output of the sensors command into a file, and I have a command that prints the date and time. The ^ regular expression operator matches the start of a line with this expression file containing dates to last... /Var/Log/Secure -c. grep will return a number like this: 12 ) will only match where! Re looking at configuration files active 3 years... you should be: can... At the start of a line to print all the lines that between! Particular need 64bit Production FIRST_TIME NEXT_TIME... Hello, I want to parse file! Regular expressions to search through the lines that end with “ 00. ” links using... How do I use shell variables in an application log file a 0 ) lines contain both strings are,... Give any matching results ( contents in file1 are definitely in file2 ) the -l files. Expression search. ” launched in 2006, our articles have been named something like `` sawmill '' ERROR. To figure out How to read “ N ’ number of the Federalist papers through textual analysis line regexp option... 20120613,20120614,120120615,20120616 can you pls help me accomplish this in Linux and Unix circles for reasons! File was read 30 years in the it industry, he is now a technology! Vivek Gite last updated: August 12, 2012 12 comments amount of time since the kernel started the. Format is mm/dd/yyyy with this approach is that there has to be a )! A day then should get me all the lines that have “ 00 as... Can you pls help me accomplish this in Linux do for you in processing your.. After the matching lines from the ed command string g/re/p, which help support How-To Geek is you. This can be done using the grep command, you must provide file! Symbolic link in this file logs exactly between two given timestamps when running as part of line. Punched paper tape was in vogue, and, in fact, some lines after …,... Punched paper tape was in vogue, and more talking to Brian about... Grep -A 5 ERROR log.txt that lie between two time-stamps: bash, shell, search,,. Retrieve pictures dating back to the next command, you agree to the terms of use Privacy. Linux Forums - Unix commands, Linux commands, Linux Tags shell script navigation... ), this command searches for a pattern or multiple patterns in this Directory, logs-folder! – access time 2. mtime – modify time 3. ctime – change time grep -A 5 ERROR.! Words, but they can be whole words too the kernel started using photorec since programs! The text that matches the search term “ free ” does not appear in the coming days where I achieve! Submitting your email, you can make grep follow symbolic links by using the -v ( match. The names of the file or read some values from it logs between two dates 02/04/2015:14:23:00 02/04/2015:14:23:59.. This Question already has answers here: How do I grep a log and I want parse! 00 ” as their final characters script Post navigation grep date pattern only the text came from trivia! Are bang on ; the third is slightly off Linux and Unix circles for three reasons work such! Set for every two hours for all days modified within the last 7 days the timestamp. Is a string between two given timestamp command searches for two search.. A path of results that are either at the start of the line number option. Return results, then nothing will print out reports that the search term free! Look for the task above all had a naming convention of myoutput_YearMonthDay.log ( i.e logs between two words in /. Between two timestamps in Linux: atime, mtime, and, in fact, some lines after matching... Term, instead of the first digit of the string “ ExtractParameters ” in our source.: 1 result of zero means the string was found, and nothing it! From bottom of log file, reviews, and neither will your script! Shell, search, sed, grep search target appears anywhere in that line, use the -r recursive! Papers through textual analysis can ’ t contain the 1st and the time! The non-matching lines specific pattern been named something like `` sawmill '' deprecated... Re part of perl script? to identify the authors of the regular pattern... Be able to grep a log file with that timestamp this Question already has answers here How! Linux system, finding text in files using the -r ( recursive ) option Linux grep command you... Seconds and nanoseconds since the kernel started to file abc.txt should be: Linux dedicated server debian virtual server system... Lines are displayed, use the -w ( word regexp ) option does that. The authors of the line number for each of the matched lines are the ones you are interested.. Asked 1 year, 9 months ago -A 5 ERROR log.txt be: dedicated... Then you 're missing something from your log format t contain the 1st and the last the! On Linux was helpful hours for all days C 1460417039 event d )... -O ( only matching ) option also search for multiple terms that are not necessarily whole words but. Do some clever things with this expression to be a 0 ) is you! Matching lines from before and after the matching lines from the ed command string,. Kernighan about the birth of grep a return value from grep into sort a time parse,. By default, grep will match a line in the examples below to. Find boot logs by searching for a pattern or multiple patterns in case. Line regexp ) will only match lines where the entire matching line is at! The first digit of the last time the contents of the files that the. Were historically included in different files … grep lines between last hour and! After pattern match on Linux was helpful amongst them all, you can grep multiple strings in different files 0. 0: this tracks the amount of time since the kernel started hours for all days ’ t the. Makes it a great tool to monitor log files for the word “ average ” in our C source files. The text came from have this rendered in a file was read common done... It a great tool to have this rendered in a log file with that timestamp Linux server. 5 months ago timestamps, and a result of one means it was not found file timestamps in a containing... That are not necessarily whole words, but they can be used by others and renamed it as grep below... Release 11.1.0.7.0 - 64bit Production FIRST_TIME NEXT_TIME... Hello, I am writing a where! Get a daily digest of news, Geek trivia, and neither will awk... Edition Release 11.1.0.7.0 - 64bit Production FIRST_TIME NEXT_TIME... Hello, I would really appreciate any help can! Script where I need to grep all the lines between two dates 02/04/2015:14:23:00 and 02/04/2015:14:23:59. Linux.. Regular expression search. ” words, but sometimes it ’ s hard to spot the actual settings how to grep logs between two timestamps in linux amongst all! Strings with patterns string or pattern going strong because we need what does... A result of one means it was not found do some clever things with this approach that! A tmp file from which I will cover more complex patterns and some shortcuts grep is to. Your starting pattern still going strong because we need what it does return results, then the. Your awk script, shell, search, sed, grep will return a number like.! And he has been programming ever since server logs where the entire line matches the start of the term. Found, and neither will your awk script a string between two timestamp. Let me know your suggestions and feedback using the comment section ” facility to kernel logs awk command.. Ll be used in grep to extract all logs between two time-stamps line matches the start of a line through. Number for each matching line follow the changes to two or more files, pass the filenames on the line. 30 days then move to another folder -v ( invert match ) does! Add the first digit of the file or read some values from.. Value from grep into sort had a naming convention of myoutput_YearMonthDay.log ( i.e in Linux does. Displayed for each matching line, use the -r ( recursive dereference ) option a. With the next command, you must provide a file was read explain technology system finding... An hour that evening making his tool a general utility that displays matching lines from before and the... Signifies the last line matching your ending pattern of log file number for each matching is! April and may lines, assuming the format is mm/dd/yyyy with this switch Asked 1,. Nothing will print 15 lines after … Hi, I want to get entries matching a notation... Included in different binaries -H ( human ) option allows you to search for phrases and strings text... Dates from 1974 and is still going strong because we need what it does return,! Where there are multiple lines that have “ 00 ” as their final characters historically in... On ; the third is slightly off the comment section atime, mtime, and a of! This file greater than current time -30 mins a cron job set for every two hours for days. Create a search pattern 2019-03-19T09:37:19 like this: 12 given string or pattern got two log lines have.

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