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Full Discussion: Gnu tool; sed awk echo etc to prepend or append string to a file
Top Forums Shell Programming and Scripting Gnu tool; sed awk echo etc to prepend or append string to a file Post 302992316 by bash_in_my_head on Thursday 23rd of February 2017 04:19:39 PM
Old 02-23-2017
Gnu tool; sed awk echo etc to prepend or append string to a file
Looking to add text to a file, example

File example;
Code:
nodegroups:
  check-hosts: L@host.domain.com,host2.domain.com,host3.domain.com

I need to take a file with a one line list of hosts separated by commas

Code:
host.domain.com,host2.domain.com,host3.domain.com

and prepend the string " check-hosts: L@" to the line of hosts above (line 2). I need to have two spaces before "check-hosts: L@"
My approach has been to prepend the string " check-hosts: L@" to the file containing the line of hosts. but I am open to other ways as long as I can use the file that contains a list of hosts as the starting poing.

Line 1 nodegroups: needs to be above line 2 in my example.
 

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LEARN ABOUT NETBSD

mknetid

MKNETID(8)						    BSD System Manager's Manual 						MKNETID(8)

NAME

     mknetid -- a NIS filter program

SYNOPSIS

     mknetid [-q] [-d domain] [-p passwdfile] [-g groupfile] [-h hostfile] [-m netidfile]

DESCRIPTION

     mknetid is used to create a map named netid.byname.  The map consists of information from passwd(5), group(5) and hosts(5) eventually con-
     catenated with a netid(5) file.

     The options are as follows:

     -d domain	    NIS domain to use instead of the default domain.

     -g groupfile   Alternate group(5) file.  Default is /etc/group.

     -h hostfile    Alternate hosts(5) file.  Default is /etc/hosts.

     -m netidfile   Alternate netid(5) file.  Default is /etc/netid.

     -p passwdfile  Alternate passwd(5) file.  Default is /etc/passwd.

     -q 	    Keep quiet about multiple occurrences of a uid; ignore all but the first.

FILES

     /etc/group
     /etc/hosts
     /etc/netid
     /etc/passwd

SEE ALSO

     domainname(1), group(5), hosts(5), netid(5), passwd(5), nis(8)

AUTHORS

     Mats O Jansson <moj@stacken.kth.se>

BSD
								 February 26, 2005							       BSD
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