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Full Discussion: Need advise/tip if there is more efficient way of doing this cut/paste/awk after changing a field
Top Forums UNIX for Beginners Questions & Answers Need advise/tip if there is more efficient way of doing this cut/paste/awk after changing a field Post 303044486 by newbie_01 on Monday 24th of February 2020 07:05:09 AM
Old 02-24-2020
Need advise/tip if there is more efficient way of doing this cut/paste/awk after changing a field
Hi,

This is the script currently and it is working as required. Just thought maybe there is a better or easier way of doing what I am trying to do.

Code:
$ cat x.ksh
#!/bin/ksh
#

cut -d"|" -f1 x.txt > x1.txt
cut -d"|" -f2 x.txt | awk -F"=" '{ print "USER="tolower($2) }' > x2.txt
cut -d"|" -f3- x.txt > x3.txt

paste -d "|" x1.txt x2.txt x3.txt | sort | uniq > x4.txt

cat x.txt
echo
cat x4.txt
echo

Below is an excerpt of the file that I want to change. This is x.txt, the original file that I want to run this on is about 1000+ lines. Basically, these files are from several log files merged into one and I am wanting to change the USER=<username> field so that <username> is in lower case. I am working on the assumption that USERNAME=<username> is always field2.


Code:
PROGRAM=JDBC Thin Client|USER=MICKEY|HOST=11.123.12.123|testmachine.xyz.com.zz
PROGRAM=JDBC Thin Client|USER=mickey|HOST=11.123.12.123|testmachine.xyz.com.zz

Sample run of the script below:


Code:
$ ./x.ksh
PROGRAM=JDBC Thin Client|USER=MICKEY|HOST=11.123.12.123|testmachine.xyz.com.zz
PROGRAM=JDBC Thin Client|USER=mickey|HOST=11.123.12.123|testmachine.xyz.com.zz

PROGRAM=JDBC Thin Client|USER=mickey|HOST=11.123.12.123|testmachine.xyz.com.zz

I could simply do
Code:
sort x.txt | tr [:upper:] [:lower:] | uniq

but for 'clarity' I prefer to only change USER=<username> to USER=<lowercase_username> and leave the rest of the line as it is. I can't work out the awk or sed command options to use to achieve what I wanted, hence I ended up with a shell script instead. Maybe there is an awk one-liner that can do what I am trying to achieve Smilie

Please advise. Thanks in advance.
 

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LEARN ABOUT REDHAT

mac2unix

dos2unix(1)						      General Commands Manual						       dos2unix(1)

NAME

       dos2unix - DOS/MAC to UNIX text file format converter

SYNOPSYS

       dos2unix [options] [-c convmode] [-o file ...] [-n infile outfile ...]

       Options:

       [-hkqV] [--help] [--keepdate] [--quiet] [--version]

DESCRIPTION

       This manual page documents dos2unix, the program that converts plain text files in DOS/MAC format to UNIX format.

OPTIONS

       The following options are available:

       -h --help
	      Print online help.

       -k --keepdate
	      Keep the date stamp of output file same as input file.

       -q --quiet
	      Quiet mode. Suppress all warning and messages.

       -V --version
	      Prints version information.

       -c --convmode convmode
	      Sets conversion mode. Simulates dos2unix under SunOS.

       -o --oldfile file ...
	      Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used.

       -n --newfile infile outfile ...
	      New  file  mode.	Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be
	      used or you WILL lost your files.

EXAMPLES

       Get input from stdin and write output to stdout.

	      dos2unix

       Convert and replace a.txt. Convert and replace b.txt.

	      dos2unix a.txt b.txt

	      dos2unix -o a.txt b.txt

       Convert and replace a.txt in ASCII conversion mode.  Convert and replace b.txt in ISO conversion mode.  Convert	c.txt  from  Mac  to  Unix
       ascii format.

	      dos2unix a.txt -c iso b.txt

	      dos2unix -c ascii a.txt -c iso b.txt

	      dos2unix -c mac a.txt b.txt

       Convert and replace a.txt while keeping original date stamp.

	      dos2unix -k a.txt

	      dos2unix -k -o a.txt

       Convert a.txt and write to e.txt.

	      dos2unix -n a.txt e.txt

       Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt.

	      dos2unix -k -n a.txt e.txt

       Convert and replace a.txt. Convert b.txt and write to e.txt.

	      dos2unix a.txt -n b.txt e.txt

	      dos2unix -o a.txt -n b.txt e.txt

       Convert c.txt and write to e.txt. Convert and replace a.txt.  Convert and replace b.txt. Convert d.txt and write to f.txt.

	      dos2unix -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt

DIAGNOSTICS

BUGS

       The program does not work properly under MSDOS in stdio processing mode.  If you know why is that so, please tell me.

AUTHORS

       Benjamin Lin - <blin@socs.uts.edu.au>

       Bernd Johannes Wuebben (mac2unix mode) <wuebben@kde.org>

MISCELLANY

       Tested environment:

	      Linux 1.2.0 with GNU C 2.5.8

	      SunOS 4.1.3 with GNU C 2.6.3

	      MS-DOS 6.20 with Borland C++ 4.02

       Suggestions and bug reports are welcome.

SEE ALSO

       unix2dos(1) mac2unix(1)

1995.03.31							   dos2unix v3.0						       dos2unix(1)
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