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Full Discussion: Modifying bash script to take each line in a file and execute command
Top Forums Shell Programming and Scripting Modifying bash script to take each line in a file and execute command Post 302968475 by galford on Wednesday 9th of March 2016 05:21:17 PM
Old 03-09-2016
Actually it works when I execute it for one host per command.

Code:
[/home/virtual/mysqlt]# sh sql2 localhost
[/home/virtual/mysqlt]# ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

I want it to make automatic to use the full lines of the hosts file.

So what it needs to do...

- load the hosts file
- read each line and execute ./mysql etc etc which the procedure is already there.

I have searched google and came up with this:

Code:
for file in *foo*
do   
if [ -f "$file" ];then 
mv "$file" /destination    
fi 
done

I really am new to this and I have no clue where to insert that and adapt it to suit my needs.

---------- Post updated at 05:21 PM ---------- Previous update was at 05:15 PM ----------

Quote:
Originally Posted by rdrtx1
in a file named like scr.sh try something like:
Code:
#!/bin/bash

while read ip
do
   if [ -n "$ip" ]
   then
      while read user pass
      do
         CMD=`ps -eaf | grep -c mysql`
         if [ "$CMD" -gt "50" ]
         then
            sleep 15
         fi
         ./mysql $ip $user $pass &
      done < pass_file
   fi
done < host_file

Yep, its working. Thank you. Also thank you for making this clean.
 

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LEARN ABOUT POSIX

libbash

LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME

     libbash -- A bash shared libraries package.

DESCRIPTION

     libbash  is  a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
     want to load and use in scripts of your own.

     It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.

     Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1).  A bash shared library that can be  loaded
     using
     ldbash(1) must answer 4 requirments:

     1.     It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).

     2.     It must contain a line that begins with '#EXPORT='.  That line will contain (after the '=') a list of functions that the library
	    exports.  I.e. all the function that will be usable after loading that library will be listed in that line.

     3.     It must contain a line that begins with '#REQUIRE='.  That line will contain (after the '=') a list of bash libraries that are
	    required for our library.  I.e. every bash library that is in use in our bash library must be listed there.

     4.     The library must be listed (For more information, see ldbashconfig(8)).

   Basic guidelines for writing library of your own:
     1.     Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.

     2.     Try to declare all variables intended for internal use as local.

     3.     Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
		  __<library_name>_
	    For example, internal function myfoosort of hashstash library should be named as
		  __hashstash_myfoosort
	    This helps to avoid conflicts in global name space when using libraries that come from different vendors.

     4.     See html manual for full version of this guide.

AUTHORS

     Hai Zaar <haizaar@haizaar.com>
     Gil Ran <ril@ran4.net>

SEE ALSO

     ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1)

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