Connect and share knowledge within a single location that is structured and easy to search. I am redirecting grep results to a file, and then using cat to show its contents on the screen.
I want to know how many lines of results I have in my results file and then add it to some counter. If you have already collected the grep output in a file, you could output a numbered list with:. Besides, you have two processes where one suffices. If you want to grep to your terminal and print a count of the matches at the end, you can do:. From the tty 4 man page :. It is a synonym for the controlling terminal of a process, if any.
Don't use wc: it doesn't count the last line if it's not terminated by the end of line symbol at least on mac. Use this instead:. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Join Date: Jan Originally Posted by vino. Please dont hijack another thread. I am creating a new thread. You can use wc to find the number of lines. Last edited by radoulov; at AM.. Reason: spelling Originally Posted by radoulov.
Originally Posted by ghostdog Hi ghostdog, I think i know how to do it. See below! How to find count total number of pattern in a file … File contains : a. Write the total number of rows in multiple files into another file. Hello Friends, I know you all are busy and inteligent too I am stuck with one small issue if you can help me then it will be really great.
Is any of these useful in itself as opposed to things to build upon to make a program that does more than counting lines , other than wc -l and pure ba sh? Gilles: I think the phrase "many ways" in the question triggered a challenge that Steve and I rose to. Gilles: Oh, you meant first. The easy answer if you assume a limited line length: uniq -c -f file. JosipRodin: Quotes added — Dennis Williamson.
Show 9 more comments. Gilles 'SO- stop being evil' k gold badges silver badges bronze badges. Steven D Steven D Hm is the last piece really line? I'm sure it depends on everyone's usecase; for the 'last piece' is usually a line of text that someone didn't cap off with a newline. The usecase I most often encounter is a file with a single string of text that does not end in a newline. That is, without a newline at the end, you don't have a line and strictly speaking, not a valid text file.
This is a very inefficient way to do it. Remember, bash reads are slow. I just tried with a text file of MB taking an actual text file and concatenating it a thousand times and more than 2. Not nothing — the tools do it in a fraction of a second — but certainly awaitable. However, by definition you'll have to iterate through all the records since the operating system has no way to parse line-oriented files since files are byte-oriented. In lieu of a great answer, I'll also present the timings on my system of several of these commands!
Put an exit after printing the 10th line so that awk won't process the 5 million records file further. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 11 years, 6 months ago. Active 11 years, 6 months ago. Viewed 72k times. For example to get 10th line, I want to do something like command file-name 10 Is there any such command available?
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