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Shell Programming and Scripting
Is sed the answer?
Post 302134085 by LaLonde on Tuesday 28th of August 2007 07:05:36 PM
08-28-2007
Is sed the answer?
Hey, I am very new to scripting and could use a bit of help.
I have a situation where I have an ascii file and I want to delete all lines beneath a particular string.
EXAMPLE:
The contents of a file named example.txt looks like the following:
JANUARY
FEBRUARY
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
Now I want to be able to run a command where it will delete all lines in the example.txt file beneath the "JUNE" line. I assume that this is pretty easy to do, but given my lack of experience I am having trouble figuring this out.
Is sed the answer? If so, what would the exact command be given my example?
The system I will run the command on is a Solaris 10 base install system with no 3rd-party packages installed.
Thank you in advance!
- LaLonde
I have a situation where I have an ascii file and I want to delete all lines beneath a particular string.
EXAMPLE:
The contents of a file named example.txt looks like the following:
JANUARY
FEBRUARY
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
Now I want to be able to run a command where it will delete all lines in the example.txt file beneath the "JUNE" line. I assume that this is pretty easy to do, but given my lack of experience I am having trouble figuring this out.
Is sed the answer? If so, what would the exact command be given my example?
The system I will run the command on is a Solaris 10 base install system with no 3rd-party packages installed.
Thank you in advance!
- LaLonde
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LEARN ABOUT REDHAT
mac2unix
dos2unix(1) General Commands Manual dos2unix(1) NAME
dos2unix - DOS/MAC to UNIX text file format converter SYNOPSYS
dos2unix [options] [-c convmode] [-o file ...] [-n infile outfile ...] Options: [-hkqV] [--help] [--keepdate] [--quiet] [--version] DESCRIPTION
This manual page documents dos2unix, the program that converts plain text files in DOS/MAC format to UNIX format. OPTIONS
The following options are available: -h --help Print online help. -k --keepdate Keep the date stamp of output file same as input file. -q --quiet Quiet mode. Suppress all warning and messages. -V --version Prints version information. -c --convmode convmode Sets conversion mode. Simulates dos2unix under SunOS. -o --oldfile file ... Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used. -n --newfile infile outfile ... New file mode. Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be used or you WILL lost your files. EXAMPLES
Get input from stdin and write output to stdout. dos2unix Convert and replace a.txt. Convert and replace b.txt. dos2unix a.txt b.txt dos2unix -o a.txt b.txt Convert and replace a.txt in ASCII conversion mode. Convert and replace b.txt in ISO conversion mode. Convert c.txt from Mac to Unix ascii format. dos2unix a.txt -c iso b.txt dos2unix -c ascii a.txt -c iso b.txt dos2unix -c mac a.txt b.txt Convert and replace a.txt while keeping original date stamp. dos2unix -k a.txt dos2unix -k -o a.txt Convert a.txt and write to e.txt. dos2unix -n a.txt e.txt Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt. dos2unix -k -n a.txt e.txt Convert and replace a.txt. Convert b.txt and write to e.txt. dos2unix a.txt -n b.txt e.txt dos2unix -o a.txt -n b.txt e.txt Convert c.txt and write to e.txt. Convert and replace a.txt. Convert and replace b.txt. Convert d.txt and write to f.txt. dos2unix -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt DIAGNOSTICS
BUGS
The program does not work properly under MSDOS in stdio processing mode. If you know why is that so, please tell me. AUTHORS
Benjamin Lin - <blin@socs.uts.edu.au> Bernd Johannes Wuebben (mac2unix mode) <wuebben@kde.org> MISCELLANY
Tested environment: Linux 1.2.0 with GNU C 2.5.8 SunOS 4.1.3 with GNU C 2.6.3 MS-DOS 6.20 with Borland C++ 4.02 Suggestions and bug reports are welcome. SEE ALSO
unix2dos(1) mac2unix(1) 1995.03.31 dos2unix v3.0 dos2unix(1)