format output with what?

Question

I'm trying to format the output from the following command;

MYIP=(/sbin/ifconfig $(getnic) | awk '/inet/ { print $2 } ' | sed -e s/addr://); echo $MYIP

which generates the following output;

172.30.0.1 fe80::42:c5ff:fecd:f09f 172.31.0.1 fe80::42:47ff:fe57:2f0d 172.17.0.1 fe80::42:a1ff:fe4e:2508 127.0.0.1 ::1 fe80::2887:fcff:fe19:e54b fe80::bc99:3aff:fe46:dcab fe80::b090:4cff:fecb:3dc4 fe80::9c0f:6dff:fe6b:6c71 fe80::808f:5fff:febb:2669 fe80::f851:23ff:fee4:c87a fe80::4c97:24ff:fe04:ea02 fe80::4cde:e2ff:feb7:4784 fe80::c4fc:4aff:fe67:1863 192.168.1.134 fe80::d1f1:947f:9370:74ca

How do I make it look nicer, just with each ipadress on a separate line?

Edit: clarification; for now I just want all ip's on a separate line, one each. Would be noce to strip out the v6 numbers, but htatäs really not important. Would be a bonux though.

I've tried with tr, sed, awk but I guess I'm doing something wrong or using the wrong command. My thought was just to add another pipe at the end that does some kind of word wrangling magic.

EDIT: This is the complete function;

function myip() {
    MY_IP=$(/sbin/ifconfig $(getnic) | awk '/inet / { print $2 } ' | sed -e s/addr://| sort)
    echo -e ${MY_IP:-"Not connected"}
}

But it still won't print linebreaks. Working on that. Thanx for all input

@b0red Which do you want? Each IPv4 address on a separate line with the IPv6 addresses following, or each IPv4 AND IPv6 address on its own line? Please click [edit] and enhance the question to tell us. Please do not use Add Comment; instead, please use [edit]. — K7AAY, Oct 23 '19 at 23:11
Hahaha. Damn. Thank you. Easy when you think outside the box :) — b0red, Oct 23 '19 at 23:12
Can't be in the box, my cat beat me to it. OBTW, use tr to replace each space with a newline, for the mixed IPv4/v6 solution. Then, for the IPv4 only solution, delete each line which has a colon in it. — K7AAY, Oct 23 '19 at 23:52
Your command doesn't do what you say it does. It's missing at least a $ for command substitution. Please show the actual command. And use code formatting for the output, please — muru, Oct 24 '19 at 00:04
If you want only ipv4 addresses, change the regex in awk to /inet / (i.e. with a space). If you want to print MYIP with all its embedded spaces, then you need to double-quote it when you use it - e.g. echo "$MYIP" instead of echo $MYIP. Also, the command-substitution should be double-quoted too: MYIP="$(...)". See Why does my shell script choke on whitespace or other special characters? — cas, Oct 24 '19 at 08:32
You want to quote your sed-statement: sed -e 's/addr://' :-) — markgraf, Oct 24 '19 at 15:18

K7AAY · Accepted Answer · 2019-10-23T23:51:24.493

1

Add this to the end of the command string you now have:

| tr ' ' '\n'

which replaces the space character with a newline.

edited Oct 23 '19 at 23:51

answered Oct 23 '19 at 23:44

K7AAY

3,816
4
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tried that, but that doesn't work for me somehow. – b0red Oct 23 '19 at 23:54
Please grab the source file, upload it to a site like pastebin.com and put its URL in your question, and I will take a whack at it later (I hope), so someone with brains will (...braiiiiins.....) – K7AAY Oct 23 '19 at 23:56
It works now. Thanxfor all help – b0red Oct 24 '19 at 15:24

score 1 · Answer 2 · answered Oct 24 '19 at 15:17

1

Replace the echo-statement with

printf '%s\n' ${MY_IP:-"Not connected"}

and you should be good.

printf will evaluate the format-string '%s\n' for all its args and thus print a newline after each string you feed it.

answered Oct 24 '19 at 15:17

markgraf

2,860

Thanx. This worked fine! – b0red Oct 24 '19 at 15:24
You can follow up with grep to get rid of the ipv6-adresses: | grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' – markgraf Oct 24 '19 at 15:25

format output with what?

2 Answers2