Determine fastest server using the Internet Control Message Protocol (ICMP).
Install netselect utility.
$ sudo apt install netselect
Display available parameters, please read manual page for details.
$ netselect
Usage: netselect [-v|-vv|-vvv] [-I] [-m max_ttl] [-s servers] [-t min_tries] host ...
Display best server using ICMP to determine fastest server.
$ netselect -I 8.8.8.8 8.8.4.4 1.1.1.1 94.140.14.14 94.140.15.15
35 8.8.8.8
Display top five servers (the lower score is better).
$ netselect -I -s 5 8.8.8.8 8.8.4.4 1.1.1.1 94.140.14.14 94.140.15.15
35 8.8.8.8 35 8.8.4.4 78 1.1.1.1 87 94.140.15.15 100 94.140.14.14
Display useful details.
$ netselect -I -vv -s 0 8.8.8.8 8.8.4.4 1.1.1.1 94.140.14.14 94.140.15.15
Running netselect to choose 0 out of 5 addresses. ............................................................... 8.8.8.8 17 ms 12 hops 100% ok (10/10) [ 37] 8.8.4.4 16 ms 12 hops 100% ok (10/10) [ 35] 1.1.1.1 34 ms 13 hops 100% ok (10/10) [ 78] 94.140.15.15 35 ms 15 hops 100% ok (10/10) [ 87] 94.140.14.14 38 ms 15 hops 90% ok ( 9/10) [ 105]
Display even more details.
$ netselect -I -vvv -s 0 debian.org
Running netselect to choose 0 out of 3 addresses. 128.31.0.62 63 ms 15 hops - HIGHER 130.89.148.77 40 ms 15 hops - OK min_lag is now 40 130.89.148.77 14 ms 8 hops - HIGHER 130.89.148.77 37 ms 12 hops - HIGHER 130.89.148.77 38 ms 14 hops - HIGHER 149.20.4.15 185 ms 15 hops - HIGHER 128.31.0.62 137 ms 23 hops - HIGHER 130.89.148.77 37 ms 15 hops - OK min_lag is now 37 130.89.148.77 38 ms 15 hops - OK 130.89.148.77 38 ms 15 hops - OK 130.89.148.77 38 ms 15 hops - OK 128.31.0.62 137 ms 27 hops - OK 130.89.148.77 39 ms 15 hops - OK 149.20.4.15 186 ms 23 hops - OK 130.89.148.77 38 ms 15 hops - OK 130.89.148.77 38 ms 15 hops - OK 128.31.0.62 135 ms 25 hops - OK 130.89.148.77 40 ms 15 hops - OK 130.89.148.77 39 ms 15 hops - OK 149.20.4.15 186 ms 19 hops - OK 128.31.0.62 138 ms 24 hops - HIGHER 128.31.0.62 137 ms 25 hops - OK 149.20.4.15 185 ms 17 hops - OK 128.31.0.62 134 ms 25 hops - OK 149.20.4.15 184 ms 16 hops - OK 128.31.0.62 135 ms 25 hops - OK 149.20.4.15 184 ms 16 hops - OK 128.31.0.62 135 ms 25 hops - OK 128.31.0.62 134 ms 25 hops - OK 149.20.4.15 183 ms 16 hops - OK 128.31.0.62 135 ms 25 hops - OK 149.20.4.15 184 ms 16 hops - OK 128.31.0.62 135 ms 25 hops - OK 149.20.4.15 185 ms 16 hops - OK 128.31.0.62 135 ms 25 hops - OK 149.20.4.15 183 ms 16 hops - OK 149.20.4.15 185 ms 16 hops - OK 130.89.148.77 38 ms 15 hops 100% ok (10/10) [ 95] 128.31.0.62 135 ms 25 hops 100% ok (10/10) [ 472] 149.20.4.15 184 ms 16 hops 100% ok (10/10) [ 478]
Display details for DNS names that resolve to more than one IP address and tag these for easier reference.
$ netselect -I -vv -s 0 debian.org:debian ubuntu.com:ubuntu
Running netselect to choose 0 out of 6 addresses. ...................................................... 128.31.0.62:debian 136 ms 25 hops 100% ok ( 2/ 2) [ 476] 130.89.148.77:debian 39 ms 15 hops 100% ok (10/10) [ 97] 149.20.4.15:debian 195 ms 19 hops 66% ok ( 2/ 3) [ 849] 185.125.190.29:ubuntu 42 ms 16 hops 100% ok (10/10) [ 109] 185.125.190.21:ubuntu 53 ms 16 hops 100% ok (10/10) [ 137] 185.125.190.20:ubuntu 43 ms 16 hops 100% ok (10/10) [ 111]