Используйте команду sed
для извлечения связанных полей.
например
sed 's/.*time=\([0-9.]\+\).*/\1/p' test.log |sort
$ cat test.log
PING 10.74.88.113 (10.74.88.113) 56(84) bytes of data.
64 bytes from 10.74.88.113: icmp_seq=1 ttl=59 time=0.326 ms
64 bytes from 10.74.88.113: icmp_seq=2 ttl=59 time=0.333 ms
64 bytes from 10.74.88.113: icmp_seq=3 ttl=59 time=0.322 ms
64 bytes from 10.74.88.113: icmp_seq=4 ttl=59 time=0.335 ms
64 bytes from 10.74.88.113: icmp_seq=5 ttl=59 time=0.337 ms