There are probably a lot of ways to do this, but I would use sed.
Get the first three lines of a file:
Get the next three lines:
The -n is used to suppress standard output, because by default, sed prints the entire file with the specified modifications, in addition to anything you tell it to print with the p command.
I would definitely recommend learning sed, and maybe awk too. sed has a simple syntax and only a few commands, but it is still very useful. Both sed and awk can be run either as simple commands or by reading multiple instructions from a script.
I have a file given below. I want to split the file where ever I came across
***(instead you can put ### symbols in the file) . Also I need to name the file by extracting the report name from the first line which is in bold(eg:RPT507A) concatinated with DD(day on which the file runs). Can someone... (1 Reply)
I need to split a file based on certain context inside the file. Is there a unix command that can do this? I have looked into split and csplit but it does not seem like those would work because I need to split this file based on certain text. The file has multiple records and I need to split this... (1 Reply)
Hello
I have a requirement where i need to split the Input fixed width file which contains multiple invoices into multiple files with 2 invoices per file.
Each invoice can be identified by its first line's second character which is "H" and sixth character is " " space and the invoice would... (10 Replies)
I have file as shown below. Would like to split the file based on the context of data.
Like, split the content between "---- XXX Info ----" and "
---- YYY Info ----" to a file.
When I try using below command, 2nd file contains all the info starting after first "---- YYYY Info ----" instance.... (8 Replies)
Hi all,
I have a file (say file.txt) which contains comma-separated rows. Each row has seven columns. Only column 4 or 5 (not both) can have empty values like "" in each line.
Sample lines
So, now i want all the rows that have column 4 as "" go in file1.txt and all the rows that have column... (8 Replies)
Hello friends,
Is there any way to split file from n to n+6 into 1 file and (n+7) to (n+16) into other file etc.
f.e I have source pipe delimated file with 20 lines and i need to split 1-6 in file1 and 7-16 in file2 and 17-20 in file 3
I need to split into fixed number of file like 4 files... (2 Replies)
Hi I have a file with over a million lines (rows) and I want to split everything from 500,000 to a million into another file (to make the file smaller). Is there a simple command for this?
Thank you
Phil (4 Replies)
Hi All,
I am having a problem. I tried to extract the chunk of data and tried to fix I am not able to. Any help please
Basically I need to remove the for , values after K,
this is how it is now
A,,
B,
C,C,
D,D,
12/04/10,12/04/10,
K,1,1,1,1,0,3.0,
K,1,1,1,2,0,4.0,... (2 Replies)
Discussion started by: arunkumar_mca
2 Replies
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shtool-subst
SHTOOL-SUBST.TMP(1) GNU Portable Shell Tool SHTOOL-SUBST.TMP(1)NAME
shtool-subst - GNU shtool sed(1) substitution operations
SYNOPSIS
shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
[-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]
DESCRIPTION
This command applies one or more sed(1) substitution operations to stdin or any number of files.
OPTIONS
The following command line options are available.
-v, --verbose
Display some processing information.
-t, --trace
Enable the output of the essential shell commands which are executed.
-n, --nop
No operation mode. Actual execution of the essential shell commands which would be executed is suppressed.
-w, --warning
Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution
operations resulted in no content change on all files.
-q, --quiet
Suppress warning on substitution operation resulting in no content change.
-s, --stealth
Stealth operation. Preserve timestamp on file.
-i, --interactive
Enter interactive mode where the user has to approve each operation.
-b, --backup ext
Preserve backup of original file using file name extension ext. Default is to overwrite the original file.
-e, --exec cmd
Specify sed(1) command directly.
-f, --file cmd-file
Read sed(1) command from file.
EXAMPLE
# shell script
shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch]
# RPM spec-file
%install
shtool subst -v -n
-e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g'
-e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g'
`find . -name Makefile -print`
make install
HISTORY
The GNU shtool subst command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 2001 for GNU shtool. It was prompted
by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications.
SEE ALSO shtool(1), sed(1).
18-Jul-2008 shtool 2.0.8 SHTOOL-SUBST.TMP(1)