ping Command in Linux with Examples
Ping Command
Ping command is the simple way to send and receive data to another computer over the network. It is most frequently used to test, whether the system is reachable through network. It is used to check how much time it takes to transfer and receive the data.
Basic Syntax
ping < options> hostname < packetsize> < count>
Pinging the host
Ping command is used to check whether the host is alive or not. It sends and receives the packets in 1 sec time interval.
[user1@linuxhelp ~]$ ping google.com
PING google.com (216.58.197.78) 56(84) bytes of data.
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=1 ttl=57 time=10.1 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=2 ttl=57 time=13.3 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=3 ttl=57 time=12.1 ms
--- google.com ping statistics ---
3 packets transmitted, 5 received, 0% packet loss, time 2345ms
rtt min/avg/max/mdev = 17.876/38.210/74.353/25.625 ms
Here, it keeps on pinging unless it is destructed manually. And at last it will show up the packets loss and transferred.
Increase or decrease Time interval
The ping time interval can be increased or decreased so that it will be allowed to wait for specified time to send the next packets.
-i is the option to increase and decrease the time interval.
Increase time interval
Increase in time interval will wait for 5 seconds to send the next packets.
[user1@linuxhelp ~]$ ping -i 5 google.com
PING google.com (216.58.197.78) 56(84) bytes of data.
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=1 ttl=57 time=10.1 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=2 ttl=57 time=13.3 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=3 ttl=57 time=12.1 ms
--- google.com ping statistics ---
3 packets transmitted, 5 received, 0% packet loss, time 2345ms
rtt min/avg/max/mdev = 17.876/38.210/74.353/25.625 ms
Decrease in time interval
Decrease in time interval will reduce the time interval to send the next packets.
[user1@linuxhelp ~]$ ping -i 0.9 google.com
PING google.com (216.58.197.78) 56(84) bytes of data.
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=1 ttl=57 time=6.1 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=2 ttl=57 time=4.3 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=3 ttl=57 time=4.1 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=4 ttl=57 time=5.6 ms
--- google.com ping statistics ---
4 packets transmitted, 5 received, 0% packet loss, time 2345ms
rtt min/avg/max/mdev = 17.876/38.210/74.353/25.625 ms
Only super user can notify the time interval for below 0.1 seconds, if others try then the following message will be displayed.
[user1@linuxhelp ~]$ ping -i 0.1 google.com
PING google.com (216.58.197.46) 56(84) bytes of data.
ping: cannot flood minimal interval, allowed for user, is 200ms
Sending, receiving and stopping packets at minimum count
-c is the option to send, receive and stop the packets at the minimum count.
The below command runs for 4 counts and cuts automatically and exits.
[user1@linuxhelp ~]$ ping -c 4 google.com
PING google.com (216.58.196.110) 56(84) bytes of data.
64 bytes from maa03s19-in-f110.1e100.net (216.58.196.110): icmp_seq=1 ttl=57 time=28.9 ms
64 bytes from maa03s19-in-f110.1e100.net (216.58.196.110): icmp_seq=2 ttl=57 time=79.5 ms
64 bytes from maa03s19-in-f110.1e100.net (216.58.196.110): icmp_seq=3 ttl=57 time=12.0 ms
64 bytes from maa03s19-in-f110.1e100.net (216.58.196.110): icmp_seq=4 ttl=57 time=22.0 ms--- google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3026ms
rtt min/avg/max/mdev = 12.030/35.628/79.557/26.063 ms
Flood the network
Super users can send hundreds of packets per second. It prints ' .' when a packet is sent and prints ‘ ^’ when a packet is received.
-f is the option used for flooding network.
Ping command cannot be used by the normal user.
[root@linuxhelp user1]# ping -f google.com
PING linuxhelp (127.0.0.1) 56(84) bytes of data.
.&hellip ^
--- linuxhelp ping statistics ---
4241289 packets transmitted, 4241289 received, 0% packet loss, time 49006ms
rtt min/avg/max/mdev = 0.004/0.004/0.045/0.002 ms, ipg/ewma 0.011/0.005 ms
It transfers lot of packets and receives the same amount. It should be done only with super user.
Ping summary statistics
Ping summary statistics prints the details of packets sent and received.
-q is the option used to view the statistics.
[user1@linuxhelp ~]$ ping -c 5 -q google.com
PING google.com (216.58.197.78) 56(84) bytes of data.
--- google.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4074ms
rtt min/avg/max/mdev = 14.796/44.831/68.701/22.146 ms
Change ping packet size
Generally, the packets are sent and received in default value of 64 bytes.
-s is option used to change the packet size.
Ping command changes the packet size from 64 to 72 bytes. It is displayed 72 because it calculates the packet lost, received and transmitted.
[user1@linuxhelp ~]$ ping -s 100 google.com
PING linuxhelp (127.0.0.1) 100(128) bytes of data.
72 bytes from linuxhelp (127.0.0.1): icmp_seq=1 ttl=64 time=0.031 ms
72 bytes from linuxhelp (127.0.0.1): icmp_seq=2 ttl=64 time=0.044 ms
72 bytes from linuxhelp (127.0.0.1): icmp_seq=3 ttl=64 time=0.045 ms
--- linuxhelp ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2278ms
rtt min/avg/max/mdev = 0.031/0.040/0.045/0.006 ms
Timed pinging
Ping command is used to ping for specified time period and it exits automatically irrespective of the packets sent or received.
-w is option the command for timed pinging.
[user1@linuxhelp ~]$ ping -w 5 google.com
PING google.com (216.58.197.78) 56(84) bytes of data.
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=1 ttl=57 time=10.1 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=2 ttl=57 time=13.3 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=3 ttl=57 time=12.1 ms
--- google.com ping statistics ---
3 packets transmitted, 5 received, 0% packet loss, time 2345ms
rtt min/avg/max/mdev = 17.876/38.210/74.353/25.625 ms
It will ping for ' 5' seconds and exits automatically.
Ping in specified path
Ping command can be used in specific path. Here, it will sent the packets through this path and received, if there is any destructed in these path then it returns failure ping.
[user1@linuxhelp ~]$ ping hostname1 hostname2 hostname3
Audible ping
It simply gives a beep sound when the desired host is reachable.
-a is the option for audible ping.
[user1@linuxhelp ~]$ ping -a google.com
PING google.com (216.58.197.78) 56(84) bytes of data.
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=1 ttl=57 time=10.1 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=2 ttl=57 time=13.3 ms
64 bytes from maa03s21-in-f14.1e100.net (216.58.197.78): icmp_seq=3 ttl=57 time=12.1 ms
--- google.com ping statistics ---
3 packets transmitted, 5 received, 0% packet loss, time 2345ms
rtt min/avg/max/mdev = 17.876/38.210/74.353/25.625 ms
It will work only in terminal number 1 to 7 as well as gnome terminal not in console window.