Question

7

Extract values from terminal

rated 0 times [ 7] [ 0] / answers: 1 / hits: 1720 / 2 Years ago, sat, september 10, 2022, 2:41:29

I need help to extract only the time's value when pinging using sed.

ping 192.168.1.1

PING 192.168.1.11 (192.168.1.11) 56(84) bytes of data.

64 bytes from 192.168.1.11: icmp_seq=1 ttl=64 time=0.028 ms

64 bytes from 192.168.1.11: icmp_seq=2 ttl=64 time=0.027 ms

64 bytes from 192.168.1.11: icmp_seq=3 ttl=64 time=0.024 ms

64 bytes from 192.168.1.11: icmp_seq=4 ttl=64 time=0.031 ms

So after using sed I would like to get the following output:

ping 192.168.1.1 | sed '???'

0.028

0.027

0.024

0.031

Thank you!

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errettas

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4 Years ago

answered 2 Years ago erranbe · Accepted Answer

With sed you can do:

ping 192.168.1.1 | sed -n 's/.*time=([^ ]*).*/1/p'

That simply looks for the longest stretch of non-space after time=, uses parentheses to capture it so we can later refer to it as 1 and just replaces everything on the line with whatever was captured. The -n (don't print by default) along with the /p (print if this worked) at the end of the substitution operator ensure we only print relevant lines.

I wouldn't use sed for this though, other tools are simpler here. For example:

grep
```
ping 192.168.1.1 | grep -Po 'time=KS+'
```

Perl

ping 192.168.1.1 | perl -lne '/time=(S+)/ && print $1'

awk

ping 192.168.1.1 | awk -F'[= ]' '/time=/{print $(NF-1)}'