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Full Discussion: i am not getting any idea how to do the following with SED cmd
Top Forums UNIX for Dummies Questions & Answers i am not getting any idea how to do the following with SED cmd Post 302340456 by mrtiller on Monday 3rd of August 2009 11:37:02 AM
Old 08-03-2009
Quote:
Originally Posted by sankar_vitam
ok sir i agree with you; but i tried by using the following sed commands

1)$sed 's/^.//' myfile1
2)$sed 's/..$//' myfile1
3)$sed 's/ \([a-z]*\)/ \([a-z]*\)/ \2,\1' myfile1

NOte but i am not getting the required output plz help


my
given input file "myfile1" is as follows

root pts/1 july3109 192.200.200.9
cse1 pts/2 july3109 192.200.200.10
cse2 pts/3 july3109 192.200.200.11
cse3 pts/4 july3108 192.200.200.12


output to be required is (using sed commads):
1) delete the first character in each line of the above input file
2)and deletes the character before the last character in each line of the above file
3)swap the first and 2nd words in the above file
1. What do you mean by "word"? If you mean strictly alphabetic characters then the first line has the first word as "root" and the second word as "pts", but the second line has the first word as "cse" and the second word as "pts." Is this really what you want? Perhaps you really mean "swap the first and 2nd fields delimted by whitespace."

2. I'm guessing you are deleting the last two characters of the line instead of just the last character. It would help if you posted the output you are getting as well as the additional information other repliers have suggested.

3. Your command to swap words has other problems besides the lack of a definition for what a word is. Do you really want to insert a comma in the output between the swapped words? I don't see that requirement in your list. Also, s command for swapping should have given you a "command garbled" message from sed because you either

a. did not escape the "/" or
b. you have extra characters after the final "/" of the sed command. The form of your 3rd sed command should be the same as the first two.
 

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LEARN ABOUT OSF1

pts_apropos

PTS_APROPOS(1)						       AFS Command Reference						    PTS_APROPOS(1)

NAME

       pts_apropos - Displays each help entry containing a keyword string

SYNOPSIS

       pts apropos -topic <help string> [-help]

       pts ap -t <help string> [-h]

DESCRIPTION

       The pts apropos command displays the first line of the online help entry for any pts command that has in its name or short description the
       string specified by the -topic argument.

       To display the syntax for a command, use the pts help command.

OPTIONS

       -topic <help string>
	   Specifies the keyword string to match, in lowercase letters only.  If the string is more than a single word, surround it with double
	   quotes ("") or other delimiters.

       -help
	   Prints the online help for this command. All other valid options are ignored.

OUTPUT

       The first line of a command's online help entry names it and briefly describes its function. This command displays the first line for any
       pts command in which the string specified by the -topic argument is part of the command name or first line.

EXAMPLES

       The following command lists all pts commands that include the word "create" in their names or short descriptions:

	  % pts apropos create
	  creategroup: create a new group
	  createuser: create a new user

PRIVILEGE REQUIRED

       None

SEE ALSO

       pts(1), pts_help(1)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26							    PTS_APROPOS(1)
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