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Full Discussion: How to make a loop to read the input from a file part by part?
Top Forums UNIX for Beginners Questions & Answers How to make a loop to read the input from a file part by part? Post 303038091 by arun_adm on Saturday 24th of August 2019 04:02:45 PM
Old 08-24-2019
How to make a loop to read the input from a file part by part?
Hi All,

We've a VDI infrastructure in AWS (AWS workspaces) and we're planning to automate the process of provisioning workspaces. Instead of going to GUI console, and launching workspaces by selecting individual users is little time consuming. Thus, I want to create them in bunches from AWS CLI (installed on centos 7). To achieve this I've created below shell script to launch the workspaces from CLI with least efforts. Please note, the ws-userlist.txt has a list of 60 users, one word per line.

Code:
for i in `cat ws-userlist.txt`;do command-to-create-workspaces DirectoryId=<directoryID>,UserName=$i,BundleId=<bundleID>;done

Now, here, there is a limitation of above workspace creation command. It can only build maximum 25 workspaces at one execution. I wonder if there any way to make the loop read the ws-userlist.txt in such a way that it read the first 25 users and take it as input for the command and execute it. once the it get executed, loop should go back to the input file, and read next set of 25 users and execute the command. Once it get executed, loop again go back to input file, and read the last 10 usernames and run the command.
Please note, username count could vary.Sometime I may have a list of 30, sometimes it could be 55.

I've basic knowledge of shell scripting. Need your expert help on this.
Thanks in advance.
 

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LEARN ABOUT DEBIAN

strut

STRUT(1p)						User Contributed Perl Documentation						 STRUT(1p)

NAME

       strut - command line interface (using Socialtext::Resting) to the Socialtext REST services

SYNOPSIS

	  strut help

	  strut configure

	  strut list_workspaces
	  strut list_pages <workspace>

	  strut get_page <workspace> <pagename>
	  strut set_page <workspace> <pagename> <filename>

	  strut list_tags <workspace> <pagename>
	  strut put_tag <workspace> <pagename> <tag>
	  strut set_tags <workspace> <pagename> <tags>

	  strut list_tagged_pages <workspace> <tag>

	  strut list_attachments <workspace> <pagename>
	  strut get_attachment <workspace> <pagename> <attachment>
	  strut add_attachment <workspace> <pagename> <filename>

	  strut show_breadcrumbs <workspace>
	  strut show_backlinks <workspace> <pagename>
	  strut show_frontlinks <workspace> <pagename>

	  All list operations can further be controlled with the following operations:
	  --query (search term for within the results)
	  --filter (filter the titles of the results)
	  --order (only accepts 'newest' right now)
	  --count (restrict number of returned results)
	  --accept (for your accept headers - text/html, text/plain, application/json)

	  Example:
	    strut --query=searchterm --filter=titlefilter --order=newest --count=number list_pages myworkspace

COMMANDS

       The following commands are supported

   help
       Standard man page for this program

   configure
       Configure strut with username, password, and server information.  See the CONFIGURATION section below for a discussion of your
       configuration options.

   show_breadcrumbs
       Get the breadcrumbs for the current user in this workspace.

   list_workspaces
       Give a list of all workspaces on the server

   list_workspace_tags <workspace>
       List the tags for a workspace.

   list_pages <workspace>
       Give a list of all pages in the given workspace.  If no workspace is given you will be prompted to pick from available workspaces.

   list_tagged_pages <workspace>
       Give a list of all pages in the given workspace with the given tag.

   get_page <workspace> <page_name>
       Retrieve the contents of the specified page.  If no workspace or page are given the user will be prompted to select from the available
       workspaces/pages.

   set_page <workspace> <page_name> <filename>
       Save the specified page on the system.

   add_attachment <workspace> <page_name> <filename>
       Add the attachment to the specified page on the system.

   list_attachments <workspace> <page_name>
       List all attachments on the specified page.

   list_pagetags <workspace> <page_name>
       List all tags on the specified page.

   show_backlinks <workspace> <page_name>
       Show backlinks to the specified page name.

   show_frontlinks <workspace> <page_name>
       Show frontlinks to the specified page name.

   put_tag <workspace> <page_name> <tag>
       Add the specified tag to the specified page name.

   set_tags <workspace> <page_name> <tags>
       Set the tags for the specified page name.

CONFIGURATION

       In order to run correctly, strut needs to have a username, password, and server name.  This can be configured in one of several ways:

   Command line:
	   strut --username <username> --password <password> --server <server>

   Environment variables:
	   STRUT_USERNAME
	   STRUT_PASSWORD
	   STRUT_SERVER

   Configuration file:
	   ~/.app/strut.conf

       If strut can't determine your username/password/server, it will call the 'configure' subcommand to create a configuration file for you.

AUTHORS

	   <chris.dent@socialtext.com>
	   <kirsten.jones@socialtext.com>

perl v5.14.2							    2012-04-23								 STRUT(1p)
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