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awk programming: August 2008

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Friday, 22 August 2008. Gnu Awk - gawk - Manual. This is a very useful resource - although it's specifically talking about gawk most of it will be applicable to other variations of awk:. Http:/ www.gnu.org/software/gawk/manual/. Thursday, 21 August 2008. Awk: terms and descriptions. I found this article by IBM that very clearly describes the different components of an awk program:. Http:/ www.ibm.com/developerworks/library/l-awk1.html. Awk: more complex examples. Print first two fields in opposite order:.

intro-to-awk.blogspot.com

awk programming: Gnu Awk - gawk - Manual

http://intro-to-awk.blogspot.com/2008/08/gnu-awk-manual.html

Friday, 22 August 2008. Gnu Awk - gawk - Manual. This is a very useful resource - although it's specifically talking about gawk most of it will be applicable to other variations of awk:. Http:/ www.gnu.org/software/gawk/manual/. Subscribe to: Post Comments (Atom). Jo Ackroyds Around the World Motorcycle Adventure. OpenVMS, Linux and UNIX resources. Gnu Awk - gawk - Manual. Awk: terms and descriptions. Awk: more complex examples. Awk: more simple examples. Awk: appending fields from one row to the precedin.

intro-to-awk.blogspot.com

awk programming: October 2008

http://intro-to-awk.blogspot.com/2008_10_01_archive.html

Wednesday, 15 October 2008. Awk script to find the maximum value of many returned rows. Below is a complete script that pulls out the maximum value for two specific criteria (disk name and time) - more than one row is returned for each so for the value in $3 we had to find the maximum. For FILE in $( ls /var/test/perf/archive/measure/input/*$1*disk2.dat.gz ). DATFILE=$( echo ${FILE} awk -F'/' '{ print substr($8,1,length($8)-3) }' ). DATE=$( echo ${DATFILE} awk -F'-' '{ print $4"/"$3"/"$2 }' ). OpenVMS, L...

intro-to-awk.blogspot.com

awk programming: awk: using the length() function

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Wednesday, 3 September 2008. Awk: using the length() function. OK, take the following code snippit as an example:. Echo this.is.test-for-awk awk -F'.' '{ printf substr($3,6,length($3)-9)" nLength of $3: "length($3)" n" }'. Length of $3: 12. All the above awk command is doing is accepting the input of "this.is.test-for-awk" from an echo command and splitting it into it's component parts as described within the body of the awk command. Now, what the above is doing is splitting down $3 based starting from t...

intro-to-awk.blogspot.com

awk programming: awk: more complex examples

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Thursday, 21 August 2008. Awk: more complex examples. EXAMPLES # is the comment character for awk. 'field' means 'column'. Print first two fields in opposite order:. Awk '{ print $2, $1 }' file. Print lines longer than 72 characters:. Awk 'length 72' file. Print length of string in 2nd column. Awk '{print length($2)}' file. Add up first column, print sum and average:. END { print "sum is", s, " average is", s/NR }. Print fields in reverse order:. Awk '{ for (i = NF; i 0; - i) print $i }' file. Printf "lp...

intro-to-awk.blogspot.com

awk programming: September 2008

http://intro-to-awk.blogspot.com/2008_09_01_archive.html

Wednesday, 3 September 2008. Awk: using the length() function. OK, take the following code snippit as an example:. Echo this.is.test-for-awk awk -F'.' '{ printf substr($3,6,length($3)-9)" nLength of $3: "length($3)" n" }'. Length of $3: 12. All the above awk command is doing is accepting the input of "this.is.test-for-awk" from an echo command and splitting it into it's component parts as described within the body of the awk command. Now, what the above is doing is splitting down $3 based starting from t...

intro-to-awk.blogspot.com

awk programming: awk: more simple examples

http://intro-to-awk.blogspot.com/2008/08/awk-more-simple-examples.html

Thursday, 21 August 2008. Awk: more simple examples. Cat file1 awk '$1. What is the action? Ls junk* awk '{print "mv "$0" ./iraf/"$0".dat"}' csh. Ls junk* lists the filenames, and this output is piped into awk instead of going to your screen. There is no pattern (nothing between the ' and the {), so awk proceeds to print something for each line. For example, if the first two lines from 'ls junk*' produced junk1 and junk2, respectively, then awk would print:. Mv junk1 ./iraf/junk1.dat. Awk: getting data b...

intro-to-awk.blogspot.com

awk programming: awk script to find the maximum value of many returned rows

http://intro-to-awk.blogspot.com/2008/10/awk-script-to-find-maximum-value-of.html

Wednesday, 15 October 2008. Awk script to find the maximum value of many returned rows. Below is a complete script that pulls out the maximum value for two specific criteria (disk name and time) - more than one row is returned for each so for the value in $3 we had to find the maximum. For FILE in $( ls /var/test/perf/archive/measure/input/*$1*disk2.dat.gz ). DATFILE=$( echo ${FILE} awk -F'/' '{ print substr($8,1,length($8)-3) }' ). DATE=$( echo ${DATFILE} awk -F'-' '{ print $4"/"$3"/"$2 }' ). OpenVMS, L...

intro-to-awk.blogspot.com

awk programming: November 2008

http://intro-to-awk.blogspot.com/2008_11_01_archive.html

Monday, 10 November 2008. Awk: outputting the last ten minutes of a log file. OK, I've got this log file that has the date/time stamp in field one ($1) and I just wanted to extract the last ten minutes worth of data. Using the gawk functions mktime() and strftime() I wrote the following solution:. Getting the last ten minutes (600 seconds) of a log file:. Getting Hours:Minutes:Seconds timestamp for ten minutes ago was accomplished using:. Here's my latest version:. Subscribe to: Posts (Atom).