An easy way to do this is by using fping. fping is a little bit easier ping utility to use then normal ping when trying to verify that a host is actually down.<\/p>\n\n\n\n
By default fping returns if a host is “alive” or “unreachable”<\/p>\n\n\n\n
Example: <\/p>\n\n\n\n
$ fping 192.168.1.4
192.168.1.4 is alive<\/pre>\n\n\n\nOr for a host that is down it returns something like the following<\/p>\n\n\n\n
$ fping 192.168.1.5
ICMP Host Unreachable from 192.168.1.2 for ICMP Echo sent to 192.168.1.5
ICMP Host Unreachable from 192.168.1.2 for ICMP Echo sent to 192.168.1.5
ICMP Host Unreachable from 192.168.1.2 for ICMP Echo sent to 192.168.1.5
ICMP Host Unreachable from 192.168.1.2 for ICMP Echo sent to 192.168.1.5
192.168.1.5 is unreachable<\/pre>\n\n\n\nYou can adjust the retry rate with the -r option, default is 3 which it has multiple of the Host Unreachable lines. Changing it to 1 or 2 gets rid of those lines so it just shows that the host is unreachable.<\/p>\n\n\n\n
$ fping -r 1 192.168.1.5\n192.168.1.5 is unreachable<\/pre>\n\n\n\nPing multiple addresses<\/strong><\/p>\n\n\n\n
Fortunately pinging multiple addresses with fping is as easy as adding them to the end of the command. For example<\/p>\n\n\n\n
fping -r1 192.168.1.1 192.168.1.2<\/pre>\n\n\n\nwill ping both the specified addresses one after the other and print the results to the terminal.<\/p>\n\n\n\n
Example:<\/p>\n\n\n\n
$ fping -r 192.168.1.1 192.168.1.10 192.168.1.45 \n192.168.1.1 is alive\n192.168.1.10 is alive\n192.168.1.45 is unreachable<\/pre>\n","protected":false},"excerpt":{"rendered":"An easy way to do this is by using fping. fping is a little bit easier ping utility to use then normal ping when trying to verify that a host is actually down. By default fping returns if a host … Continue reading