Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: perl question - removing line from input file
Top Forums Shell Programming and Scripting perl question - removing line from input file Post 74053 by reggiej on Tuesday 7th of June 2005 01:45:59 PM
Old 06-07-2005
zazzybob,

perl -pi -e '$_ = "" if ( $. == 1 );' large_file
I am trying to convert the above perl command line you reference to a script.
I am not sure what the -pi does for the command line. But what I have below works but I am wondering if it is efficent or should be done in another manner.

$ cat junk
#!/usr/bin/perl

open (infile, "+< /adsm/ACTIVITIES/CHANGES/TGA2_OBSOLETE_CLNUP/x ");
open (outfile,">/adsm/ACTIVITIES/CHANGES/TGA2_OBSOLETE_CLNUP/z");
while ( $line = <infile>) {
if ($. == 1) {
}
else {
print (outfile "$line");
}
} #end while
system ("cp /adsm/ACTIVITIES/CHANGES/TGA2_OBSOLETE_CLNUP/z /adsm/ACTIVITIES/CHANGES/TGA2_OBSOLETE_CLNUP/x");
close(infile);
close(outfile);
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

removing directory in an input file

Hi, How can I removed the directory in the input file? The script responsible for storing the report in an input file is this: while }" ] do echo "penetration|${penfilename}|${penfilenamedaterange}" >> ${OUT_DIR}/penrpt_emailfile.txt (( i=i+1 )) done For the penfilename: ... (2 Replies)
Discussion started by: chrysSty
2 Replies

2. Shell Programming and Scripting

Perl question, parsing line by line

Hello, Im very new to PERL and as a project to work on developing my skills at PERL Im trying to parse poker hands. Ive tried many methods however I cant get the last step. $yourfile= 'FILENAME';#poker hands to parse open (FILE, "$yourfile") or die $!; @lines = <FILE>; for (@lines) ... (1 Reply)
Discussion started by: Ek0
1 Replies

3. Shell Programming and Scripting

Sed question (Removing a line of text)

I am working with bash on HP-UX server at school. As practice for scripting, I am trying to make a pretend server admin script that adds a user to the system, deletes a user from the system, and lists all users of the pretend system. I have accomplished this with a select loop. Adding users, and... (2 Replies)
Discussion started by: masterscout1977
2 Replies

4. Shell Programming and Scripting

sed to read line by line and input into another file

I have two files. Fileone contains text string one text string two text string three Filetwo contains Name: Address: Summary: Name: Address: Summary: Name: Address: Summary: I would like to use sed to read each line of file one and put it at the end of the summary line of file... (3 Replies)
Discussion started by: dolacap
3 Replies

5. Shell Programming and Scripting

script in perl for removing strings between a file

I have file that looks like: ATOM 2517 O VAL 160 8.337 12.679 -2.487 ATOM 2518 OXT VAL 160 7.646 12.461 -0.386 TER ATOM 2519 N VAL 161 -14.431 5.789 -25.371 ATOM 2520 H1 VAL 161 -15.336 5.698 -25.811 ATOM 2521 H2 VAL 161 -13.416 10.529 17.708 ATOM 2522 H3 VAL 161 -14.363 ... (4 Replies)
Discussion started by: kanikasharma
4 Replies

6. Shell Programming and Scripting

Curl - input line by line from text file

Hi, I've got a text file with hundreds of lines I need to upload to an API via curl, one by one. The text file is like: 2012-08-01 10:45,124 2012-08-02 10:45,132 2012-08-03 10:45,114 I want to get curl to go through the text file sending a post for each line. like: curl --request... (0 Replies)
Discussion started by: emdeex
0 Replies

7. Shell Programming and Scripting

awk :quick question removing empty line.

How to write in awk to remove lines starting with "#" and then process the file: This is not working: cat file|awk '{if ($0 ~ /^#/) $0="";print NF>0}' When I just give cat file|awk '{if ($0 ~ /^#/) $0="";print }' it prints the blank lines . I don't wnat the blank lines along with the... (15 Replies)
Discussion started by: rveri
15 Replies

8. Homework & Coursework Questions

Removing punctuations from file input or standard input

Just started learning Unix and received my first assignment recently. We haven't learned many commands and honestly, I'm stumped. I'd like to receive assistance/guidance/hints. 1. The problem statement, all variables and given/known data: How do I write a shell script that takes in a file or... (4 Replies)
Discussion started by: fozilla
4 Replies

9. Shell Programming and Scripting

Perl removing line match with pattern in column

Hi, I have log like this: ... (1 Reply)
Discussion started by: justbow
1 Replies

10. Shell Programming and Scripting

Perl removing line match with pattern in column

Hi, I have log like this: ... (1 Reply)
Discussion started by: justbow
1 Replies

LEARN ABOUT DEBIAN

dxf2vrml

DIME(1) 						      General Commands Manual							   DIME(1)

NAME

       dxf2vrml - program to convert .dxf formatted 3-D datasets to .VRML format.

SYNOPSIS

       dxf2vrml [infile][-ooutfile][-emaxerr][-f][-l]

DESCRIPTION

       This manual page documents briefly the dxf2vrml command.  (default infile is stdin, default outfile is stdout) This manual page was written
       for the Debian GNU/Linux distribution because the original program does not have a manual page.	Instead, it has documentation in  the  GNU
       Info format; see below.

       dxf2vrml is a program that...

OPTIONS

       These  programs	follow	the  usual  GNU  command  line	syntax, with long options starting with two dashes (`-').  A summary of options is
       included below.	For a complete description, see the Info files.

       infile default infile is stdin

       -o outfile,
	      default outfile is stdout

       -e,    Maximum error when tessellating curves

       -f,    Respect the $FILLMODE header variable

       -vrml2,
	      Write as vrml2. Default is vrml1

       -l,    Use layer color, ignore the color index

       -s,    Set sub parameter

       -h,    Show useage.

SEE ALSO

       files in: /usr/share/doc/libdime/, /usr/share/doc/libdime-dev/.
       The programs are documented fully by http://www.coin3d.org/lib/dime/, available via the Internet.

AUTHOR

       This manual page was written by A. Maitland Bottoms <bottoms@debian.org>, for the Debian GNU/Linux system (but may be used by others).

								 January 11, 2002							   DIME(1)
All times are GMT -4. The time now is 09:38 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy