awk - pattern-directed scanning and processing language

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Extract marked strings from text file using Bash

I have files which are of the following style - these are parametrised configuration files; the values within the #characters are replaced with real values from a database depending on environment. ...
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326 views

sed and awk challenge [closed]

Here is a great challenge for someone to attack! Is there a way to achieve the following using sed and/or awk. Please see myfile.txt below: $cat myfile.txt: entry "entry-header" entry-top name ...
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Grepping several lines from Nmap output

I apologize in advance as this is a simple question. So I'm attempting to scan a Class C to identify all mail servers by IP. The vast majority of IPs aren't mail servers. I'm trying to filter out the ...
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1answer
701 views

Append timestamp to top command output

All, I'm using top -l 0 -s 1 -pid XXX -stats rsize | awk 'NR%13==0; fflush(stdout)' > output.txt to store the rsize value of a process in a file. Currently the contents of output.txt look ...
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2answers
246 views

How do I ad an if statement (regarding punctuation in a word) to this bash script

I have this bash script #!/bin/bash cat $@ | while read line do for word in $line do echo $word | circling-the-square # here's where i need to add the if statement: ...
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2answers
221 views

How to make a list and count LaTeX keywords in a source file?

I am a beginner, trying to make lists (and eventually count and make statistics) the LaTeX keywords appearing in some documents. Basically a LaTeX "valid" keyword can be identified by: The fact ...
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3answers
629 views

How can I turn ugly output into pretty, useful information?

How can I turn this ugly output into pretty, useful data? The output: /* ---------- TA#box#AbC_p ---------- */ insert_job: TA#box#AbC_p job_type: a #owner: bob permission: gx date_conditions: 1 ...
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131 views

How to parse fields out of a text file and write them to another file

I have executed a database command and have generated an output file of the results. Each field name starts with dbt_xxxxxx Each field value is the value after the equal sign. how can I parse the file ...
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407 views

How to parse a file to extract 3 digits numbers kept in a “group number”

I am a beginner, and trying to write a shell script to parse a text file that is extracted from a standardization pdf file. I would like for each test group (identified by Group 0, Group 1... to get ...
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1answer
999 views

AWK - change the file name (special characters)

I have two files: ~/Pulpit/kot$ find . -name "*jpg" -printf "%f\n" 1.jpg `[~!($%^_&*){.}\___"`]`1.jpg I want to change their name to: _home_pic_Pulpit_kot_1.jpg ...
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escaping a single dot with double backslash - awk

"effective awk programming" book has an example on Field-Splitting. here is the example: If you want fields to be separated by a literal period followed by any single character, use ‘FS = ...
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How to sed only that lines that contains given string?

INPUT: Select ASDF 325 sdfg sdflk lk Select TRG 46sdg rasdftz fsgs 45 Select ASDF 6ffg sdfg 4456 sdrg OUTPUT: Select ASDF 325 XXXX sdflk lk Select TRG 46sdg rasdftz fsgs 45 Select ASDF 6ffg XXXX ...
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217 views

Sort fields inline

I'm trying to sort within a line of input over an unknown number of fields: Input: ab bc bc ab cd ef bc bc cd ef cd bc ab ef ab bc cd gh Output: ab bc ab bc bc cd ef bc cd ef ab cb cd ab bc cd ...
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2answers
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Using awk to process ls output with spaces in filenames/paths

All, I have a script in which I use find command to filter out all png files in a given folder and list them along with their size. I want the output in the following format: someFile.png => 1.2K ...
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3answers
5k views

How to delete files filtered out by awk

I have the following files in a directory: -rw-r--r-- 1 smsc sys 46 Apr 22 12:09 bills.50.1.3G.MO.X.20120422120453.Z -rw-r--r-- 1 smsc sys 28 Apr 22 12:15 bills.50.1.3G.MO.X.20120422120953.Z ...
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1answer
1k views

file, awk and iconv to automatically adapt tex-file encoding

I have a set of tex-files with mixed encodings, e.g. (subset of output of file -i *.tex) f1.tex: text/plain; charset=utf-8 f2.tex: text/plain; charset=utf-8 f3.tex: text/x-tex; charset=us-ascii ...
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3answers
361 views

swapping fields in columns by fixed pattern (yes, no, no, yes)

I want to produce a following list of pages (for imposition work); (number of pages is variable, but I make a sample of my needs using a list of 16 pages, logic is the same for longer lists) 1,16 8,9 ...
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3answers
4k views

How to list all unique ip address currently connected to a specific port?

Say I want to know how many unique clients are connected to port 5222 on a server. Can you find a way better/faster/stronger than this? netstat -nt | grep ':5222.*ESTABLISHED' | awk '{ print $5 }' \ ...
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1answer
776 views

Using Awk To Parse Individual Lines

Here is the output from qacct -o Total : OWNER WALLCLOCK UTIME STIME CPU MEMORY IO IOW ...
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2answers
946 views

How can I delete lines that has an empty first column?

INPUT: CC2352345|m,safnlasndfmnyxdcvyxcvyxcv |klasjdf |3|lasdjflasdf| |2345567356 CC3543353|asdfasdffghntz |klasjdf |3|lsajdfl | ...
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2answers
690 views

Why does this awk command not play as well with find as sed does?

I am very much a newbie at Unix/Linux command line stuff, and mostly get to where I'm going by copying, pasting, and modifying code I find on the internet. Just mentioning that in hopes people will ...
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3answers
1k views

Combining Awk with Curl

How would I set my curl statement so that it puts the value of each $3 in for the username, and the value of each $4 for the wallclock information? Some further information I am trying to take the ...
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1answer
3k views

Use AWK add new line if match exists

I have a file with the following format: aaa@ bbb bbb@ ccc& ddddd@ aaaf ccc@ ddd& eee: abcd& dassda The output should be: aaaa@ bbb bbb@ ccc& ddddd@ aaaf ccc@ ddd& eee@ ...
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2answers
506 views

Turn a bash and php script into a distributable rpm

I'm semi unix knowledgeable and I want to be able to call down an rpm from my server, run it with something like rpm -i , and have access to the script anywhere. The script is a combination awk and ...
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2answers
943 views

simple script rotating table

I'm trying to write a simple script, that just rotates csv table. I mean I have some file: head1;head2;head3 field11;field12;field13 and so on. All I want, just to make my file ...
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2answers
2k views

How to divide a list of values by a number in command line?

I am trying to translate a simple program to the command line using unix utilities. For example, if I have a frequency list (after piping through uniq and sort) 5 x 4 y 1 z I want to print out, ...
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225 views

Are there 2 ways to set awk vars via command line?

I noticed an O'Reilly awk example (1997) which assigned an awk variable by setting it on the command line after the program-text. It does work, but I can't find this syntax in man / info awk. Have I ...
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2answers
268 views

Why does awk print on non-null strings and positive numbers

I've noticed some awk examples which use 1 instead of print to print $0 (eg. To conserve space, I normally use '1'. and on this site). Is this a documented / safe practice, or is is it subject to ...
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3answers
4k views

Why does awk do full buffering when reading from a pipe

I'm reading from a serial port connected to a gps device sending nmea strings. A simplified invocation to illustrate my point: $ awk '{ print $0 }' /dev/ttyPSC9 ...
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946 views

splitting the array and send the values to hashset in awk

I am getting var as argument from shell script to awk awk -v var = "blah1|blah2|blah3" -f awk_script.awk I need to put each blah's into a hashset, currently, I am doing it like this. I am getting ...
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1answer
687 views

remove trailing zeros in awk not working. syntax error

regex = "\\.*0+$"; subst = ""; system("echo "id "| awk '{sub(\\.*0+$," subst"); print}'"); It is giving the following error: awk: cmd. line:1: {sub(\.*0+$,); print} awk: cmd. line:1: ^ ...
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3answers
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Faster awk script to get the substring / string we wanted

ORDER EVENT .........[] [] ... so many other tags... [Account<25106>=ACCT1] [Destination...] .. so many other tags. I am currently trying to get the account like this. I tried using match in ...
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1answer
451 views

Shell script to check server state

I am writing a script that would ssh into the VMWare server and check if the VMs are up or not. There's some error in the server=awk "/$i/{print $2}" /home/dharmit/scripts/vmids line. I am getting ...
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A shell script for joining two files

I want to write a shell script that get two files A and B, and get a result like this: File A: user_a tel_a addr_a user_b tel_b addr_b File B: process_1 user_a process_2 user_a process_3 user_b ...
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3answers
1k views

Sorting columns from two files with awk

I have two input files 28a39a289906c01159f999a68996091a tom@dong.com 274d1d2c7e931fb55ac0c91dd41f2be7 go@far.com 44d25d3b1b70b240d5058f1be1cef576 person@domain.com 2227a768f6d253b7bf81bb4ecb15b52d ...
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5answers
667 views

changing pattern of a text file

A text file has contents something like chair table pen desk Now i want it to be changed and stored in a variable say var as below ('chair','chair'),('table','table'),('pen','pen'),('desk','desk') ...
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3answers
2k views

Awk: check for length of field

In awk. I am working on Solaris 10, so it's probably an old(er) version of awk. I came up with this rudimentary one-liner that works, at least for my particular input. awk -F\; '$3 ~ /[ ...
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2answers
3k views

How to apply the same awk action to different files?

I am new in awk and I do not know if it is possible to write an awk script that does this: I have hundred of data files that I have to sort. For each one I use the following one-liner: awk ...
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1answer
699 views

merging files and getting column values based on id field

bash-3.2$ cat sample.log sample.log.1 sample.log.2 ID COL1 COL2 COL4 1 col1 col2 col4 2 c1 c2 c4 3 co1 co2 co4 ID COL3 COL1 1 col3 col1 2 c3 c1 3 co3 co1 ID COL1 COL2 COL3 1 col1 ...
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2answers
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How to run grep on a single column?

I want to grep the output of my ls -l command: -rw-r--r-- 1 root root 1866 Feb 14 07:47 rahmu.file -rw-r--r-- 1 rahmu user 95653 Feb 14 07:47 foo.file -rw-r--r-- 1 rahmu user ...
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2answers
314 views

$2 (field reference) in awk BEGIN is not working

In the following snippet, $2 in awk is returning empty. What am I doing wrong? I am trying to find the difference between MAX and MIN. #!/bin/ksh if [ $# -ne 1 ]; then echo "Usage: sh ...
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3answers
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Is there a more elegant way to count words and assign that count to variables?

I have a script: #!/bin/bash /root/xiotech status > xiostatus.tmp SyncCount=$(grep -c Sync xiostatus.tmp) PauseCount=$(grep -c paused xiostatus.tmp) CopyingCount=$(grep -c Copying xiostatus.tmp) ...
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awk separate columns of 3

I have a file that looks like the following (the columns are separated by tabs and might contain spaces): 0637 apple 8528 1392 orange 1390 8528 unknown fruit 7537 1039 ...
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1answer
397 views

Efficient way of comparing in awk

#!/bin/awk BEGIN { while(getline var < compareTo > 0) { orderIds[var]=var; } } { if(orderIds[$0] == "") { print $0; ...
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2answers
534 views

xargs grep suggestion

grep -v "\<Swap" instruments.log | awk '{ idx=index($0, "MasterId="); masterId=substr($0, idx+length("MasterId=")+1); masterId=substr(masterId,1,index(masterId,"L")-3); print masterId; }' | xargs ...
4
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2answers
619 views

Replace one line with STDIN in a Makefile

One Makefile target is supposed to be in charge of: grabbing the output of $ perl Markdown.pl src/index.md (markdown to html) using that string to replace one line, something like CONTENT ...
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3answers
1k views

How to truncate the second column from a dot (.)?

INPUT: 10.175.192.16 vgxyxgf.de.foo.net asdf 34efg 10.175.192.17 sdtds.de.foo.net xyyxv e5432 10.175.243.20 asdfycfb.us.foo.net dfvasf 34525 OUTPUT: 10.175.192.16 vgxyxgf ...
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4answers
445 views

Align a hex text file at 9 bytes each line

I want to align the selected portion of a text file at 9 bytes each column. For example suppose my text file looks like below. 00 2f c6 b8 29 fd 02 37 11 00 9f 74 34 0b 60 72 38 20 00 9e 61 33 8e ...
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3answers
5k views

Get lines with maximum values in the column using awk, uniq and sort

I have a file with next format 2011-12-01 user1 access1 2011-12-01 user1 access2 2011-12-01 user2 access2 2011-12-01 user4 access2 2011-12-02 user1 access1 2012-01-01 user3 access1 2012-01-01 user4 ...
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4answers
9k views

Delete range of lines above pattern with sed (or awk)

I have the following code that will remove lines with the pattern banana and 2 lines after it: sed '/banana/I,+2 d' file So far, so good! But I need it to remove 2 lines before banana, but I can't ...