Flush all keys from memcached server

purge_memcache.exp

#!/usr/bin/expect --

# Purge local memcache, flushing all the keys & values

set escapechar !;  # easier to send than default ^]

set host [lindex $argv 1];
if { ![string length $host] } {
    set host "localhost";
}
set port [lindex $argv 2];
if { ![string length $port] } {
    set port "11211";
}

spawn telnet -e $escapechar "$host" $port;
expect "Connected to $host";
send "flush_all\n";

send $escapechar;
expect "telnet>";
send "quit\n";
wait;