For a list of trademarks of The Linux Foundation, please see our Trademark Usage page. I need to count the number of unique values based on two columns in a spreadsheet. The Linux Foundation has registered trademarks and uses trademarks. © Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0 This feature turns out to be pretty handy, lets say you want to find all the IP addresses in a file. This tells grep to only output the matched pattern (instead of lines that mach the pattern). Please help improve it by filing issues or pull requests. Ive been using grep to search through files on linux / mac for years, but one flag I didnt use much until recently is the -o flag. Type ( proc) like this: topk(3, sum by (app, proc) (rate(instance_cpu_time_ns)))Īssuming this metric contains one time series per running instance, you couldĬount the number of running instances per application like this: count by (app) (instance_cpu_time_ns) we could get the top 3 CPU users grouped by application ( app) and process Job and handler labels: http_requests_total Return all time series with the metric http_requests_total and the given Linux: Traverse Directory: find, xargs Count Char, Word, Lines wcĬount the number of chars, words, lines.Return all time series with the metric http_requests_total: http_requests_total Linux: Sort Lines Processing Multiple Files Show only first few lines of a huge file head filename For instance, in the first column I want to know how many Red, Blue, Green etc coloured objects are there. What I wanted to do is to have a count of 'each' of these unique values not know how many unique values are there. The tr command takes the input from the SampleFile.txt file and transforms all whitespaces to the newline character. What if I wanted a count of these unique values as well Update: I guess I didnt put the second part clearly enough. Another approach for counting the total number of occurrences using the grep command with the tr utility is as follows. Example 2: Use grep with tr(translates) Utility. Grep 'html HTTP' apache.log | awk '' filename The Linux word in the SampleFile.txt has been highlighted. More Grep Examples # print lines containing “html HTTP” in a log file, show only the 12th and 7th columns, show only certain lines, then sort, then condense repeation with count, then sort that by the count. Print just file name that does NOT match. Print just file name do NOT print the matched lines. grep -r -include='*html' pattern dirName = search files for pattern in dirName including subdirs, but only files ending in “.html”.*.html = search all files ending in “.html”, in current dir.Grep -P 'png HTTP|jpg HTTP' *log Options for File Selection Grep -v 'html HTTP' *log # print lines containing “png HTTP” or “jpg HTTP” (Perl and Python's regex are basically compatible.)Įxamples: # print lines not matching a string, for all files ending in “log” Most Useful Grep Options Options for Pattern String -F Also, comparisons honor the rules specified by LCCOLLATE.' One of the correct ways, to invoke with: sort nonUnique.txt uniq. You may want to sort the input first, or use sort -u without uniq. Grep -r -file=myPattern.txt -include=*js. Just FYI, From the uniq Man page: 'Note: uniq does not detect repeated lines unless they are adjacent. The regex is stored in file named myPattern.txt Example: # search js source code in dir and all subdirs. This is useful when you want to search complicated string in source code, such as your string is really complicated, you can put it in a file, and use the option -file= my_pattern_filename for the search text. (F means “Fixed string”) # search ruby source files that contains. Match file name by a glob pattern ( * is a wildcard that matches 0 or more any char.). Running this will show us each message only once with the count prepended to the line. So the full command will be: grep ERROR myfile.log sort uniq -c. It also has a helpful argument to count how many duplicates there were. Grep 'xyz' *html Grep for All Files in a Dir # show matching lines in dir and subdir, file name ending in html By default, the uniq command removes duplicates. Grep 'xyz' myFile # show lines containing xyz in all files ending in html in current dir top level files If you want to count only files and NOT include symbolic links (just an example of what else you could do), you could use ls -l grep -v l wc -l (thats an. Show Matching Lines # show lines containing xyz in myFile They are especially useful for processing lines. uniq filters out the adjacent matching lines from the input file (that is. In simple words, uniq is the tool that helps to detect the adjacent duplicate lines and also deletes the duplicate lines. This page is a basic tutorial on using Linux shell's text processing tools. The uniq command in Linux is a command-line utility that reports or filters out the repeated lines in a file.

Grep unique count