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quickest way to get the total number of lines in a file

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http://www.unix.com – i have a file that's about 2GB, i have to get the total number of lines in this file every 10 minutes. the interval is not an issue. i just need the proper, most efficient way to do this. any ideas? i got the following from another thread on this site, but: Code: awk 'int(100*rand())%5<1' file but this randomly pulls out 20% of lines in a file. i'm thinking this code can be slightly modified to get what i want? (HowTos)

Shoutmeloud's picture
Submitted by Shoutmeloud on 09/30/2012

Stories similar to quickest way to get the total number of lines in a file

I have a data list, like

12345 23456 67891 -20000 200 600 20 ...

Assume the size of this data set (i.e. lines of file) is N. I want to randomly draw m lines from this data file. Therefore, the output should be two files, one is the file including these m lines of data, and the other one includes N-m lines of data.

Is there a way to do that using a Linux command?

Hi All,

I have input file which is pipe delimited

A | 1 B | 2 c | 3

I need output of displaying total number of lines in a file as last column.

A | 1 | 3-----total number of linesin file. B | 2 | 3 c | 3 | 3

I try to count number of lines of a data.txt file and then if number of lines is greater than 1 then email me the file. I could not find what is wrong with my code, hope you can point out the mistake i made

Code: #!

Hi all,

I have a tab-delimited text file of size 10Mb. I am trying to count the number of lines using,

Code: grep -c . sample.txt or

Code: wc -l < sample.txt or

Code: awk 'END {print NR}'  sample.txt All these commands shows the count as 1, which means they are reading only the first header line of the file.

I have a file like below . The good pages must have 3 conditions : The pages that containing page total only must have 50 lines. The pages that containing customer total only must have 53 lines. The last page of Customer Total should be the last page. How can I accomplish separating good pages from bad pages using GAWK ?

I have file A.txt

File A

Code: 1,Hi,234 2,Hello,345 1,Kal,980, 9,KJ,098 2,de,098 .. ... I have more then 600 lines...

I want separate the files as per 150 line.

Code: First 150 lines ----File A1.xtx Second 150 lines ---File A2.txt Third 150 lines----File A3.txt. ... Rest of ----File N.txt. ..

Thanks

Shell scripting wc usage 3 years 22 weeks ago

Hi.I need to do a script that can receive any number of parameters which are file names and return the number of lines every file has.the output should be like that "The file nameoffile.txt has 5 lines".From what i have done my output is like "The file nameoffile.txt has 5 nameoffiletxt lines".how can I do the output without printing the name of file after the number of lines.

Grep the non-matching lines 22 weeks 5 hours ago

Hi,

I need to make a script to extract the number that are not in a file.

Example: I have file-A that has 100000 (70000-799999) numbers. And a file-B with number that already are in the system.

I have a text file which is having 30000 lines in it. I have to create a xml file for each 10000 lines until all the lines in the text files are written. Also please help how can i get number of lines in the text file in a shell variable?