AWK is a text-processing language. It is mainly used to manipulate and process structured data, and to generate reports.

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11
votes
3answers
13k views

Filtering top command output

I'm running a Mac and want to filter the output of the top command for a particular process such that only the PID, COMMAND and %CPU columns are displayed. After getting the PID of the process, I run:...
2
votes
3answers
4k views

How can cat/print a file except the last 2 lines?

How can get a file, except the last (for instance) 2 lines, with standard or GNU shell tools? (bash, tail, cat and so on.)
-3
votes
1answer
111 views

Using nawk, how to print all first names containing four characters?

Using nawk, how to print all first names containing four characters? I tried nawk ‘/^[[:alpha:]]{4}/{print $1}’ inputfile but didn't work Mike Harrington:(510) 548-1278:250:100:175 Christian Dobbins:...
16
votes
6answers
29k views

How to get video duration in seconds?

How can I get video duration in seconds? What I've tried: ffmpeg -i file.flv 2>&1 | grep "Duration" Duration: 00:39:43.08, start: 0.040000, bitrate: 386 kb/s mediainfo file.flv | grep ...
17
votes
6answers
12k views

Removing ANSI color codes from text stream

Examining the output from perl -e 'use Term::ANSIColor; print color "white"; print "ABC\n"; print color "reset";' in a text editor (e.g., vi) shows the following: ^[[37mABC ^[[0m How would one ...
5
votes
1answer
7k views

Counting occurrences in first column of a file

We have this file: 1 2 1 3 1 2 3 3 52 1 52 300 and 1000 more. I want to count the number of times each value occurs in the first column. 1 3 3 1 52 2 This means we saw 1 three times. How ...
3
votes
5answers
9k views

How to split a text file into multiple text files

I have a text file called entry.txt that contains the following: [ entry1 ] 1239 1240 1242 1391 1392 1394 1486 1487 1489 1600 1601 1603 1657 1658 1660 2075 2076 2078 2322 2323 2325 2740 2741 2743 ...
6
votes
5answers
4k views

Using awk to split text file every 10,000 lines

I have a large gzip'd text file. I'd like to something like: zcat BIGFILE.GZ | \ awk (snag 10,000 lines and redirect to...) | \ gzip -9 smallerPartFile.gz the awk part up there, I ...
0
votes
2answers
601 views

Grep values from nethog and netperf

I need to monitor the network activities of a process and the bandwidth of the connection. So I decided to use nethog and netperf combine with grep and awk to write the values to a file. nethog ...
0
votes
1answer
95 views

combining bourne shell and awk

This is my actual file WASfile #!/bin/sh sed -i '/^ *$/d' WASfile sed -i -e '/user=/,/group_1=/{w /tmp/1' -e 'd}' /home/wasdm/WASfile; Script to Add read -p "Press [Enter] to continue for ...
0
votes
2answers
234 views

sum numbers in different lines in shell

i have 8000 lines similar to this <Flow flowId="1" timeFirstTxPacket="+0.0ns" timeFirstRxPacket="+924100.0ns" timeLastTxPacket="+199984927558.0ns" timeLastRxPacket="+199675473275.0ns" delaySum="+...
0
votes
1answer
153 views

match patterns update output file uncomment when desired

Need suggestion for following. Have two files myfile and responsefile. First file myfile.txt user=myname user_1=yourname group=mygroup group_1=yourgroup second file responsefile.txt #...
4
votes
1answer
839 views

how to move around files using “ls -al” result in Linux?

How can I write a script to copy files from one directory to another directory according to last modified date? ls -al -rw-r--r-- 1 user user 100 2011-05-26 12:33 ...
1
vote
2answers
5k views

Piping tail -f into awk

Greeting, I am trying to pipe tail -f into awk to monitor a logfile in realtime, but according to examples, there should be not problem but I can't get it to work. here is the command I'm running ...
1
vote
1answer
189 views

Multiple input files and output files in awk

I have a folder full of text files named 000.txt to 181.txt. How can I process all of them (on the command line) with the same awk script (program.awk) and send them to their respective output files (...
1
vote
2answers
524 views

How to pass bash variables (passwords) to IRSSI config file?

I'm using IRSSI and I wonder how can I pass my IRC channel's passwords to the IRSSI config file (~/.irssi/config) without writing them directly in the file. In Mutt I've an awk command that queries a ...