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Top Forums Shell Programming and Scripting Insert character at specific location in a each line of the file Post 302983144 by greet_sed on Thursday 6th of October 2016 07:16:14 PM
Old 10-06-2016
Good that it works with last change.

to make inplace/infile edit , use
Code:
sed -i '1n;$!s/./&a/10' $file

If you want to save a backup / copy of the file before modifying it, use
Code:
sed -i.bak '1n;$!s/./&a/10' $file

After execution of above command with -i.bak option, you have 2 files now.
1) before modification with .bak extension.
2) Modified file by sed command .

Last edited by greet_sed; 10-06-2016 at 08:19 PM.. Reason: Add text
This User Gave Thanks to greet_sed For This Post:
 

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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
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