Sponsored Content
Top Forums Shell Programming and Scripting Using sed with variables (again!) Post 302236700 by Mr_Plow on Tuesday 16th of September 2008 06:13:16 AM
Old 09-16-2008
Using sed with variables (again!)

Hi,

I'm trying to use sed to delete the last three lines of a file. I currently have:

Code:
# get the amount of lines in the file
foldernum=`wc -l File_In.txt | cut -c1-8`
# remove the lines in the file
sed "${foldernum}-3,${foldernum}d" File_In.txt > File_Out.txt

I get the error - sed: unknown command

Is there a better way or have I simply got my syntax incorrect.

Cheers.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

doing a sed with variables

Hi, I'm trying to do the following , I have certain variables in a file and then I want to check for these variables in a certain cobol file to see if they contain a certain package if so replace them with value 1 but but that last line is giving problems: # for each variable in SQL file ... (1 Reply)
Discussion started by: seaten
1 Replies

2. Shell Programming and Scripting

doing a sed with variables

Hi, I'm trying to do the following , I have certain variables in a file and then I want to check for these variables in a certain cobol file to see if they contain a certain package if so replace them with value 1 but but that last line is giving problems: # for each variable in SQL file ... (1 Reply)
Discussion started by: seaten
1 Replies

3. UNIX for Dummies Questions & Answers

doing a sed on certain variables

Hi guys, I want to replace certain values with the number 1. But it is also replacing other values which contain the value I want to replace. e.g.: I want to replace ID-INTERNAL with 1, that's no problem but it will also replace ID-INTERNAL-NON-REM with 1-NON-REM I don't want to... (10 Replies)
Discussion started by: seaten
10 Replies

4. Shell Programming and Scripting

variables in sed

when i do something like substituting a particular thing with a system variable, i am unable to do that expect the varible name getting into that. for ex.. i tried, sed -e 's/date/`date`/g' <if >of but i got date replaced with "`date`" and not with the actual date .. same case happened... (5 Replies)
Discussion started by: sskb
5 Replies

5. Shell Programming and Scripting

Sed variables

HELP!!! I'm keep getting "sed: Function s/PETS/dog cannot be parsed." I have 2 files that list... # cat FILE1.txt dog cat mouse # cat FILE2.txt my pets are PETS I put this into a variable... # A=`cat FILE1.txt` # sed "s/PETS/$A" FILE2.txt > FILE3.txt (5 Replies)
Discussion started by: Zenwork
5 Replies

6. Shell Programming and Scripting

using variables with sed

I'm trying to get sed to cut and replace using variables, but it doesnt seem to work, when I run this the mod time of the file does get updated. Is my syntax incorrect in the sed command? Thanks #!/usr/bin/ksh #Modify header set -x HEAD=$(cat PBN2CPR1.TXT | awk 'BEGIN { FS = ","... (1 Reply)
Discussion started by: ddurden7
1 Replies

7. UNIX for Dummies Questions & Answers

sed using variables

Hi, I am able to use sed if I hardcode the find and replace values in a shell script. This works: sed -e 's/123v/4567/g' /path/aaa.txt > /path/aaa.txt.tmp If I use a variable, I am not able to use sed command. why? This doesnot work: i=abc j=bk${i} sed -e 's/${i}/${j}/g'... (5 Replies)
Discussion started by: new_learner
5 Replies

8. Shell Programming and Scripting

variables and sed

Is it possible to place a variable in a sed command as such? sed 's/ret_Priv()/$var/' <filename> I am doing this under Bourne. (5 Replies)
Discussion started by: plslakewood
5 Replies

9. Shell Programming and Scripting

Using Variables with SED

All I am trying to produce the following in /etc/ssh/sshd_config, # IPv4 only #ListenAddress 0.0.0.0 # IPv4 & IPv6 ListenAddress :: to # IPv4 only ListenAddress <user-entry> ListenAddress <user-entry> # IPv4 & IPv6 #ListenAddress :: The number of user entries can vary. ... (1 Reply)
Discussion started by: miyoung999
1 Replies

10. Shell Programming and Scripting

sed with variables

Im trying to use sed to print value that matches the value in variable and all lines after that. grep "Something" test.txt | sed -e '/{$variable}/,$b' -e 'd' I cant get it work, if I replace the $variable with the value it contains, it works fine... (10 Replies)
Discussion started by: olkkis
10 Replies
IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
All times are GMT -4. The time now is 12:44 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy