02-10-2009
':>file' tells the shell to redirect the output of the NOOP command (which is none) to "file", creating it if it doesn't exist, or truncating it if it exists.
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1. Shell Programming and Scripting
Dear All,
I have a comma-separated file.
1. The first line of the file(header) should have 4 commas(5 fields).
2. The last line of the file should have 1 comma(2 fields).
Pls help me in checking this condition in a shell script.
And the number of lines between the first line and last... (11 Replies)
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2. Shell Programming and Scripting
Hi,
I am having a file which contains as below
Names(aaaa
,bbbb
,cccc
,dddd)
now i want the file to be updated with new value 'eeee' as below
Names(aaaa
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,cccc
,dddd
,eeee)
Is there a way to script this ?
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3. Shell Programming and Scripting
Hi all,
I have searched and found various threads about removing spaces from a field within a text file. Unfortunately, I have not found exactly what I'm looking for, nor am I adept enough to modify what I've found into what I need.
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Hi, I am new in unix,
I just want to replace some values from text file according to column numbers. Like, I am having a table as given below:
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5. Shell Programming and Scripting
Hello
Has anyone got an example shell script that I can use to compare the contents of two files.
The files should contain the same contents, eg.
file1.txt
apple
pear
grape
file2.txt
apple
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6. UNIX for Dummies Questions & Answers
Hi,
I am trying to figure out how to copy the contents of a file to the clipboard, then paste into a command. i.e copy contents of file /path/filename.txt to <command> <paste text>
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7. Shell Programming and Scripting
Hi
I have a data file 'File2' consisting of 105670 lines. I want to copy and paste 17928 lines from 'File1' to 'File2' but I want to place it in between lines 21 and 17950 of 'File2'. How do I do it in awk?
For example-
File A has 5 lines
X
Y
1 2 3
4 5 6
7 8 9
and File B has
A
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8. Shell Programming and Scripting
Hi
I have a data file 'File2' consisting of 105670 lines. I want to copy and paste 17928 lines from 'File1' to 'File2' but I want to place it in between lines 21 and 17950 of 'File2'. How do I do it in awk?
For example-
File A has 5 lines
X
Y
1 2 3
4 5 6
7 8 9
and File B has
A
b... (1 Reply)
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Hello all,
I have a Kconfig file that looks like something below ...
================================
menu "Application type"
config GUI_TYPE_STANDARD
bool "Standard Application"
source "cfg/config/std.in"
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10. Shell Programming and Scripting
Shell script logic
Hi
I have 2 input files like with file 1 content as (file1)
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File 2 contents as fle(2)
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LEARN ABOUT FREEBSD
atf-sh
ATF-SH(1) BSD General Commands Manual ATF-SH(1)
NAME
atf-sh [-s shell] -- interpreter for shell-based test programs
SYNOPSIS
atf-sh script
DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library.
atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter-
preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not
use any non-standard extensions.
The following options are available:
-s shell Specifies the shell to use instead of the value provided by ATF_SHELL.
ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes.
ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes.
ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a
specific interpreter.
EXAMPLES
Scripts using atf-sh(3) should start with:
#! /usr/bin/env atf-sh
Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode
the path to atf-sh in the script and then use the -s option afterwards as a single parameter:
#! /path/to/bin/atf-sh -s/bin/bash
ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts.
SEE ALSO
atf-sh(3)
BSD
September 27, 2014 BSD