Regular exp in awk Post: 302447409

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1. Shell Programming and Scripting

Using reg. exp. variable in AWK??

Any idea please: How to pass a reg. exp. variable to awk call in a shell??? Thank u #!/bin/sh reg_exp=name awk '/reg_exp/{ print; }' $1

2. Shell Programming and Scripting

awk and regular expression

Ive got a file with words and also numbers. Bla BLA 10 10 11 29 12 89 13 35 And i need to change "10,29,89,25" and also remove anything that contains actually words...

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I can print a line with an expression using this: awk '/regex/' I can print the line immediately before an expression using this: awk '/regex/{print x};{x=$0}' How do I print the line immediately before and then the line with the expression?

4. Shell Programming and Scripting

usage...sed/awk/reg-exp ..in shell scripting

in shell scripting there is extensive usage of i> regular expression ii>sed iii>awk can anyone tell me the suitable contexts ...i mean which one is suitable for what kind of operation. like the reg-exp and sed seems to be doing the same job..i.e pattern matching

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extract a part of a path like (input: /etc/exp/home/bin ====> output: exp)

Hi, I need to make some extraction . with the following input to get the right output. input: /etc/exp/home/bin ====> output: exp and input: aex1234 ===> output: ex Thanks for your help,

6. Shell Programming and Scripting

Awk regular expressions

Hi Experts, Can you please help me out for the below scenario, I have a variable length file with the fixed number of columns, in which the fields are delimited by pipe symbol (|). From that file I have to extract the lines which has the following scenario, The field1 in a...

7. Shell Programming and Scripting

Regular expression in AWK

Hello world, I was wondering if there is a nicer way to write the following code (in AWK): awk ' FNR==NR&&$1~/^m$/{tok1=1} FNR==NR&&$1~/^m10$/{tok1=1} ' my_file In fact, it looks for m2, m4, m6, m8 and m10 and then return a positive flag. The problem is how to define 10 thanks...

8. Shell Programming and Scripting

scripting/awk help : awk sum output is not comming in regular format. Pls advise.

Hi Experts, I am adding a column of numbers with awk , however not getting correct output: # awk '{sum+=$1} END {print sum}' datafile 2.15291e+06 How can I getthe output like : 2152910 Thank you.. # awk '{sum+=$1} END {print sum}' datafile 2.15079e+06

9. Shell Programming and Scripting

awk regular expression

Hello, I have big files which I wanna filter them based on first column. first column should be one of these strings: chr2L || chr2R || chr3L || chr3R || chr4 || chrX and something like chr2Lh or chrY or chrM3L is not accepted. I used the following command: awk '{ if ($1=="chr2L" ||...

10. Shell Programming and Scripting

How to use regular exp to replace the character in the file?

Hi Unix Gurus, yesterday I asked a question and got answer, it works fine. I have one more thing need to help in the code awk '{print substr($0,1,3)"xxx"substr($0,7)}' file If I have 50 charactor's need to be replaced, is there any easy way to use reg exp or I have to input 50 XXXXx.........

LEARN ABOUT SUNOS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The  following  default	shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh,
       /bin/tcsh,  /bin/zsh,  /sbin/jsh,  /sbin/sh,  /usr/bin/bash,  /usr/bin/csh,  /usr/bin/jsh,  /usr/bin/ksh,  /usr/bin/pfcsh,  /usr/bin/pfksh,
       /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list.

       Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)).

FILES

       /etc/shells	       lists shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.10							    4 Jun 2001								 shells(4)

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1. Shell Programming and Scripting

Using reg. exp. variable in AWK??

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awk and regular expression

Discussion started by: maskot

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regular expression and awk

Discussion started by: nickg

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usage...sed/awk/reg-exp ..in shell scripting

Discussion started by: mobydick