Inserting a new line into an already existing file
hello ..
I am new to perl scripting, I have a text file, and would like to insert 3 new lines into the same file at different line numbers using perl scripting. Any Help regarding this will be very useful.
say the file is sample.txt, contents are
now i want to insert 3 new lines into the file, it should be as follows
Thanks in advance
Last edited by Scrutinizer; 07-06-2012 at 09:52 AM..
Reason: code tags
Hi all,
I need to know what command/s I can use to print lines from a file. I cannot do pattern matching, so grepping for a string is not possible. I'd like to say "print line 3" etc. Any ideas? Ta. (2 Replies)
I am trying to insert a line with a date stamp in a file that is used to monitor activity in one of our directories. By doing this, I want to grep that file each day and go to the last entry for each time a error occurred and pull all errors generated if any exist. If error exists I want that error... (3 Replies)
Dear All,
I have a file called football where i have a list of 11 players each on different lines.
I wish to add a name of another player on the first line.
I have created a file called footballscript in vi writing the following sed command to achieve this ...
cat football | sed -e '1 i\... (4 Replies)
Hi,
I have two files--
file1-
file2:-
i have to compare two files and where the uid is same i have to take the password and insert it above the telephone number.
the output should be like this--
uid : 1418 common so insert the password thbs above the line telephonenumber. (2 Replies)
I'm sure you guys have answered this elsewhere but I can't seem to find where so here goes.
#!/bin/bash
n=120
a=$(sed '120q;d' energy.xvg)
while ;do
a=$(sed $n'q;d' energy.xvg)
echo "$a \n" > newfile
n=$(($n+100))
done
exit 0
that script should read the file energy.xvg, start at... (1 Reply)
I need a perl script to find and replace a specific pattern in a file to a new line.
BAsically I have a single line data in a file with 10 mb to 200 MB. I want to put a new line based on a specific pattern to open the file in Excel / Access.
Following is the sample data in a file
... (1 Reply)
I have posted it previously but somehow could not delete the previous post.I felt i could not explain the problem statement well.
Here t goes.I have a file say File1. Now i need a specific pattern from the lines to be added to the other line.
File:
red blue green ABC.txt@ABC END
black... (1 Reply)
Hi,
I have this line:
ip=111.222.133.144,mac=00:16:3E:2A:08:3C,vifname=veth360','ip=10.2.3.4,vifname=veth360a'
^
|
-------
I want to insert this IP 144.133.222.111 between "144"... (4 Replies)
Friends ,
I have a large file and i need to insert a line after every line.I am actually unaware how to do it.Any help appreciated.
My File
control station *ATM* , qread $OSS.Jul13A.FI01 interval 1 intcount 1
control station *ATM* , qread $OSS.Jul13A.FI02 interval 1 intcount... (4 Replies)
Hi,
consider a file called mobile.txt as follows:
For type lovers, add a new line at the end of it by copying its previous line and add a +1 to the field1, field2
Additionally, there are only 3 plans available to lovers type, so it should not work for lovers type already having 3 lines under... (11 Replies)
Discussion started by: Gautham
11 Replies
LEARN ABOUT DEBIAN
gmt_shell_functions
GMT_SHELL_FUNCTIONS.SH(1gmt) Generic Mapping Tools GMT_SHELL_FUNCTIONS.SH(1gmt)NAME
gmt_shell_functions.sh - Practical functions to be used in GMT bourne shell scripts
SYNOPSIS
gmt_init_tmpdir
gmt_remove_tmpdir
gmt_clean_up [prefix]
gmt_message message
gmt_abort message
gmt_nrecords file(s)
gmt_nfields string
gmt_get_field string
gmt_get_region file(s) [options]
gmt_get_gridregion file [options]
gmt_get_map_width -R -J
gmt_get_map_height -R -J
gmt_set_psfile file
gmt_set_framename prefix framenumber
gmt_set_framenext framenumber
DESCRIPTION
gmt_shell_functions.sh provides a set of functions to Bourne (again) shell scripts in support of GMT. The calling shell script should
include the following line, before the functions can be used:
. gmt_shell_functions.sh
Once included in a shell script, gmt_shell_functions.sh allows GMT users to do some scripting more easily than otherwise. The functions
made available are:
gmt_init_tmpdir
Creates a temporary directory in /tmp or (when defined) in the directory specified by the environment variable TMPDIR. The name of
the temporary directory is returned as environment variable GMT_TMPDIR. This function also causes GMT to run in `isolation mode',
i.e. all temporary files will be created in GMT_TMPDIR and the .gmtdefaults file will not be adjusted.
gmt_remove_tmpdir
Removes the temporary directory and unsets the GMT_TMPDIR environment variable.
gmt_cleanup
Remove all files and directories in which the current process number is part of the file name. If the optional prefix is given then
we also delete all files and directories that begins with the given prefix.
gmt_message
Send a message to standard error.
gmt_abort
Send a message to standard error and exit the shell.
gmt_nrecords
Returns the total number of lines in file(s)
gmt_nfields
Returns the number of fields or words in string
gmt_get_field
Returns the given field in a string. Must pass string between double quotes to preserve it as one item.
gmt_get_region
Returns the region in the form w/e/s/n based on the data in table file(s). Optionally add -Idx/dy to round off the answer.
gmt_get_gridregion
Returns the region in the form w/e/s/n based on the header of a grid file. Optionally add -Idx/dy to round off the answer.
gmt_map_width
Expects the user to give the desired -R -J settings and returns the map width in the current measurement unit.
gmt_map_height
Expects the user to give the desired -R -J settings and returns the map height in the current measurement unit.
gmt_set_psfile
Create the output PostScript file name based on the base name of a given file (usually the script name $0).
gmt_set_framename
Returns a lexically ordered filename stem (i.e., no extension) given the file prefix and the current frame number, using a width of
6 for the integer including leading zeros. Useful when creating animations and lexically sorted filenames are required.
gmt_set_framenext
Accepts the current frame integer counter and returns the next integer counter.
NOTES
1. These functions only work in the bourne shell (sh) and their derivatives (like ash, bash, ksh and zsh). These functions do not work in
the C shell (csh) or their derivatives (like tcsh), and cannot be used in DOS batch scripts either.
2. gmt_shell_functions.sh were first introduced in GMT version 4.2.2 and have since been regularly expanded with other practical scripting
short-cuts. If you want to suggest other functions, please do so by mailing to the GMT mailing list: gmt-help@lists.hawaii.edu.
SEE ALSO GMT(1), sh(1), bash(1), minmax(1), grdinfo(1)GMT 4.5.7 15 Jul 2011 GMT_SHELL_FUNCTIONS.SH(1gmt)