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# Chapter 20. Command Line Scripts

Cacti support a number of command line scripts. Please find them in the `./cli` directory. As of current, following scripts are supported:

    add_device.php
    add_data_query.php
    add_graph_template.php
    add_graphs.php
    add_perms.php
    add_tree.php
    copy_user.php
    poller_graphs_reapply_names.php
    poller_output_empty.php
    poller_reindex_hosts.php
    rebuild_poller_cache.php

Numbers may vary!
In the following examples, several numbers are shown as output from various scripts. They will vary between different installations. So don't bother, if your numbers will vary

# Rebuild Poller Cache

The poller cache holds all commands that cacti will issue during the polling process in an internal format. It is possible, to review the currenty contents of the poller cache by visiting `System Utilities`, `View Poller Cache`. It is possible to apply filters to this view; it will show up like

    Localhost - Hard Drive Space   	Script Server: /var/www/html/cacti/scripts/ss_host_disk.php ss_host_disk 127.0.0.1 1 1:161:500:somesecret:::::: get total 6
    	                        RRD: /var/www/html/cacti/rra/localhost_hdd_total_61.rrd
    Localhost - Load Average 	Script: /usr/bin/perl /var/www/html/cacti/scripts/loadavg_multi.pl
    	                        RRD: /var/www/html/cacti/rra/localhost_load_1min_5.rrd
    Localhost - Logged in Users 	Script: /usr/bin/perl /var/www/html/cacti/scripts/unix_users.pl
    	                        RRD: /var/www/html/cacti/rra/localhost_users_6.rrd
    Localhost - Memory - Free 	Script: /usr/bin/perl /var/www/html/cacti/scripts/linux_memory.pl MemFree:
    	                        RRD: /var/www/html/cacti/rra/localhost_mem_buffers_3.rrd
    Localhost - Memory - Free Swap 	Script: /usr/bin/perl /var/www/html/cacti/scripts/linux_memory.pl SwapFree:
    	                        RRD: /var/www/html/cacti/rra/localhost_mem_swap_4.rrd
    Localhost - mtaReceivedMessages SNMP Version: 1, Community: somesecret, OID: .1.3.6.1.2.1.28.1.1.1.1
    	                        RRD: /var/www/html/cacti/rra/localhost_mtareceivedmessages_47.rrd
    Localhost - mtaReceivedVolume 	SNMP Version: 1, Community: somesecret, OID: .1.3.6.1.2.1.28.1.1.4.1
    	                        RRD: /var/www/html/cacti/rra/localhost_mtareceivedvolume_49.rrd

There are several circumstances, that may result in the poller cache being out of sync. An example would be a change of the name of a script used in a `Data Input Method`. This change is not automatically propagated to the poller cache. It is required, to run php -q rebuild poller_cache.php manually.

Calling the script with the parameter `--help` yields

    shell>php -q rebuild_poller_cache.php --help
    Cacti Rebuild Poller Cache Script 1.0, Copyright 2004-2015 - The Cacti Group

    usage: rebuild_poller_cache.php [-d] [-h] [--help] [-v] [--version]

    -d            - Display verbose output during execution
    -v --version  - Display this help message
    -h --help     - Display this help message

Debug mode lists the data sources items that are worked upon.

    shell>php -q rebuild_poller_cache.php -d
    WARNING: Do not interrupt this script.  Rebuilding the Poller Cache can take quite some time
    DEBUG: There are '38' data source elements to update.
    DEBUG: Data Source Item '1' of '38' updated
    DEBUG: Data Source Item '2' of '38' updated
    DEBUG: Data Source Item '3' of '38' updated
    DEBUG: Data Source Item '4' of '38' updated
    ....

Without any parameter, some dots are shown as progress indicators.

    shell>php -q rebuild_poller_cache.php
    WARNING: Do not interrupt this script.  Rebuilding the Poller Cache can take quite some time
    ......................................
    shell>

Stop the Poller when Rebuilding the Poller Cache
Rebuilding the poller cache interferes with the poller operation. Please make sure, that the poller is not running and will not start during a rebuild operation

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