squidclient Tool
This tool is a command line utility for performing web requests.
It also has a special ability to send cache manager requests to Squid proxies.
Cache manager access from squidclient
A simple way to test the access to the cache manager is:
squidclient mgr:info
If you are using a port other than 3128 on your Squid you will need to use the -p option to specify it.
See squidclient -h for more options.
To send a manager password (more on that below) there are two ways depending on your Squid version.
squidclient version 3.1.* and older you add @ then the password to the URL. So that it looks like this mgr:info@admin.
squidclient version 3.2.* use the proxy login options -u and w to pass your admin login to the cache manger.