Commands tagged IP sorted by votes

Commands tagged IP (80)

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Get all IPs via ifconfig

works on Linux and Solaris. I think it will work on nearly all *nix-es Show Sample Output
This is sample output - yours may be different.
```
10.200.10.147
127.0.0.1
```
13

ifconfig -a | perl -nle'/(\d+\.\d+\.\d+\.\d+)/ && print $1'

sneaker · 2009-07-31 09:49:17 4
sends your internal IP by email

This is useful if you have need to do port forwarding and your router doesn't assign static IPs, you can add it to a script in a cron job that checks if you IP as recently changed or with a trigger script. This was tested on Mac OSX.
This is sample output - yours may be different.
10

ifconfig en1 | awk '/inet / {print $2}' | mail -s "hello world" email@email.com

rez0r · 2009-04-28 06:01:52 4
Check if a machine is online

PING parameters c 1 limits to 1 pinging attempt q makes the command quiet (or silent mode) /dev/null 2>&1 is to remove the display && echo ONLINE is executed if previous command is successful (return value 0) || echo OFFLINE is executed otherwise (return value of 1 if unreachable or 2 if you're offline yourself). I personally use this command as an alias with a predefined machine name but there are at least 2 improvements that may be done. Asking for the machine name or IP Escaping the output so that it displays ONLINE in green and OFFLINE in red (for instance).
This is sample output - yours may be different.
9

ping -c 1 -q MACHINE_IP_OR_NAME >/dev/null 2>&1 && echo ONLINE || echo OFFLINE

UnixNeko · 2012-02-09 06:30:55 7
Check reverse DNS

The +short option should make dig less chatty.
This is sample output - yours may be different.
7

dig +short -x {ip}

putnamhill · 2009-12-21 14:43:35 0
Get Your IP Geographic Location with curl and jq
This is sample output - yours may be different.
7

curl -s https://ipvigilante.com/$(curl -s https://ipinfo.io/ip) | jq '.data.latitude, .data.longitude, .data.city_name, .data.country_name'

emphazer · 2019-04-26 09:15:00 0
Update your OpenDNS network ip

Intended for dynamic ip OpenDNS users, this command will update your OpenDNS network IP. For getting your IP, you can use one of the many one-liners here on commandlinefu. Example: I use this in a script which is run by kppp after it has successfully connected to my ISP: --- #!/bin/bash IP="`curl -s http://checkip.dyndns.org/ | grep -o '[[:digit:].]\+'`" PW="hex-obfuscated-pw-here" if [ "$IP" == "" ] ; then echo 'Not online.' ; exit 1 else wget -q --user=topsecret --password="`echo $PW | xxd -ps -r`" 'https://updates.opendns.com/nic/update?hostname=myhostname&myip='"$IP" -O - /etc/init.d/ntp-client restart & fi --- PS: DynDNS should use a similar method, if you know the URL, please post a comment. (Something with members.dyndns.org, if I recall correctly) Show Sample Output
This is sample output - yours may be different.
```
alanceil@kvirasim:19:55:0:~> wget -q --user=topsecret --password=topsecret 'https://updates.opendns.com/nic/update?hostname=myhostname&myip=12.34.56.78' -O -
good 12.34.56.78
```
5

wget -q --user=<username> --password=<password> 'https://updates.opendns.com/nic/update?hostname=your_opendns_hostname&myip=your_ip' -O -

Alanceil · 2009-06-22 18:08:42 4
Show interface/ip using awk

Interfaces like lo can be omitted from the beginning, there are probably better ways of doing this, i'm a noob at awk. Show Sample Output
This is sample output - yours may be different.
```
lo 127.0.0.1
wlan0 192.168.1.100
```
5

ifconfig -a| awk '/^wlan|^eth|^lo/ {;a=$1;FS=":"; nextline=NR+1; next}{ if (NR==nextline) { split($2,b," ")}{ if ($2 ~ /[0-9]\./) {print a,b[1]}; FS=" "}}'

alf · 2010-04-15 04:34:28 1
What is My WAN IP?

The curl command retrieve the HTML text containing the IP address. The grep command picks out the IP address from that HTML text. Show Sample Output
This is sample output - yours may be different.
```
$ curl -s checkip.dyndns.org | grep -Eo '[0-9.]+'
64.221.138.109
```
4

curl -s checkip.dyndns.org | grep -Eo '[0-9\.]+'

haivu · 2009-05-21 16:12:21 2
Count number of hits per IP address in last 2000 lines of apache logs and print the IP and hits if hits > 20
This is sample output - yours may be different.
4

tail -n2000 /var/www/domains/*/*/logs/access_log | awk '{print $1}' | sort | uniq -c | sort -n | awk '{ if ($1 > 20)print $1,$2}'

allrightname · 2010-05-10 19:08:37 0
Get the IP address of a machine. Just the IP, no junk.
This is sample output - yours may be different.
3

/sbin/ifconfig -a | awk '/(cast)/ { print $2 }' | cut -d':' -f2 | head -1

d4n3sh · 2009-04-15 06:44:18 7
Get your external IP address with a random commandlinefu.com command

There's been so many ways submitted to get your external IP address that I decided we all need a command that will just go pick a random one from the list and run it. This gets a list of "Get your external IP" commands from commanlinefu.com and selects a random one to run. It will run the command and print out which command it used. This is not a serious entry, but it was a learning exercise for me writing it. My personal favourite is "curl icanhazip.com". I really don't think we need any other ways to do this, but if more come you can make use of them with this command ;o). Here's a more useful command that always gets the top voted "External IP" command, but it's not so much fun: eval $(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p;q}') Show Sample Output
This is sample output - yours may be different.
```
$ IFS=$'\n';cl=($(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p}'));c=${cl[$(( $RANDOM % ${#cl[@]} ))]};eval $c;echo "Command used: $c"
86.134.45.64
Command used: curl ip.appspot.com
```
3

IFS=$'\n';cl=($(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p}'));c=${cl[$(( $RANDOM % ${#cl[@]} ))]};eval $c;echo "Command used: $c"

jgc · 2009-11-04 16:55:44 3
Check reverse DNS

I'm just a simple programmer. I find dig too verbose. host tells me alias(es) and IP address in a quick to grok format with nothing special to remember for input parameters. With thanks to http://www.cyberciti.biz/faq/how-to-test-or-check-reverse-dns/ Show Sample Output
This is sample output - yours may be different.
```
>host someServer 10.xxx.xx.xxx
Using domain server:
Name: 10.xxx.xx.xxx
Address: 10.xxx.xx.xxx#53
Aliases:

someServer.madeup.com is an alias for theOtherServer04.madeup.com.
theOtherServer04.madeup.com has address 10.134.159.86
```
3

host {checkIp or hostname} [dns server]

mccalni · 2009-12-21 11:48:00 0
Get just the IP for a hostname

has the benefit of being a bit more cross-platform.
This is sample output - yours may be different.
3

getent hosts google.com | awk '{print $1}'

depesz · 2010-11-03 12:02:05 0
Get the IP address

gives u each configured IP in a seperate line. Show Sample Output
This is sample output - yours may be different.
```
127.0.0.1/8
10.28.66.71/24
```
3

ip -f inet a | awk '/inet / { print $2 }'

BorneBjoern · 2012-07-18 15:13:10 0
Show LAN IP with ip(8)

ip address show | grep eth0 | sed '1d' | awk '{print $2}' does the same, but shows network-prefix.
This is sample output - yours may be different.
2

ip route show dev eth0 | awk '{print $7}'

P17 · 2009-05-26 20:29:54 1
Get just the IP for a hostname
This is sample output - yours may be different.
2

dig hostname a +short

bartman75 · 2010-10-30 19:25:55 0
Find default gateway (proper at ppp connections too)
This is sample output - yours may be different.
2

route -n | perl -ne '$ANY="0.0.0.0"; /^$ANY/ and split /\s+/ and print "Gateway to the World: ",($_[1]!=$ANY)?$_[1]:(`ip address show $_[$#_]`=~/peer ([0-9\.]+)/ and $1),", via $_[$#_].\n"'

bandie91 · 2011-09-13 08:05:58 0
Convert IP octets to HEX with no dots.

Converts IP octets to hex using printf command. Useful for generating pxeboot aliases in the pxelinux.cfg folder. Show Sample Output
This is sample output - yours may be different.
```
where myip=10.10.10.5, $myhex will equal "0A0A0A05"
```
2

myhex=$(printf '%02X' ${myip//./ };)

robinsonaarond · 2011-11-30 15:12:28 0
Grab IP address on machine with multiple interfaces

Instead of hard-coding in a check to scrape info from ifconfig based on a specific interface, do it in a more portable way. This works really well if you switch between wired, wireless, bluetooth or even VPN connections. You can get your current IP in a script (since it'll be something like tun0 instead of eth0 or wlan1). This uses a well known public ip address 8.8.8.8, but it doesn't actually connect to it, it just shows you the route it would take. Show Sample Output
This is sample output - yours may be different.
```
10.10.10.21
```
2

ip route get 8.8.8.8 2>/dev/null|grep -Eo 'src [0-9.]+'|grep -Eo '[0-9.]+'

intangible · 2012-10-14 02:06:13 1
Show your local ipv4 IP

To show ipv6 instead, use [[ -6 ]] instead of [[ -4 ]] ip -o -6 a s | awk -F'[ /]+' '$2!~/lo/{print $4}' To show only the IP of a specific interface, in case you get more than one result: ip -o -4 a s eth0 | awk -F'[ /]+' '$2!~/lo/{print $4}' ip -o -4 a s wlan0 | awk -F'[ /]+' '$2!~/lo/{print $4}' Show Sample Output
This is sample output - yours may be different.
```
192.168.0.1
```
2

ip -o -4 a s | awk -F'[ /]+' '$2!~/lo/{print $4}'

paulera · 2015-02-13 11:19:31 4
Check reverse DNS
This is sample output - yours may be different.
1

dig -x {IP}

Strubbl · 2009-12-21 12:13:30 0
Check if a machine is online with better UI

I have used single packet, and in a silent mode with no display of ping stats. This is with color and UI improvement to the http://www.commandlinefu.com/commands/view/10220/check-if-a-machine-is-online. It is as per the enhancements suggested. Show Sample Output
This is sample output - yours may be different.
```
$ echo -n "IP Address or Machine Name: "; read IP; ping -c 1 -q $IP >/dev/null 2>&1 && echo -e "\e[00;32mOnline\e[00m" || echo -e "\e[00;31mOffline\e[00m"
IP Address or Machine Name: 192.168.1.1
Online

$ echo -n "IP Address or Machine Name: "; read IP; ping -c 1 -q $IP >/dev/null 2>&1 && echo -e "\e[00;32mOnline\e[00m" || echo -e "\e[00;31mOffline\e[00m"
IP Address or Machine Name: 192.168.1.2
Offline
```
1

echo -n "IP Address or Machine Name: "; read IP; ping -c 1 -q $IP >/dev/null 2>&1 && echo -e "\e[00;32mOnline\e[00m" || echo -e "\e[00;31mOffline\e[00m"

crlf · 2012-02-09 07:00:03 1
Get the IP address
This is sample output - yours may be different.
1

ifconfig | sed -n 's/.*inet addr:$[0-9.]\+$\s.*/\1/p'

bcg62 · 2012-07-18 15:38:02 0
What is my ip?
This is sample output - yours may be different.
1

telnet v4address.com

unixmonkey39007 · 2012-08-22 19:54:27 0
Get the IP address of a machine. Just the IP, no junk.

Why use many different utilities all piped together, when you only need two? Show Sample Output
This is sample output - yours may be different.
```
127.0.0.1
10.80.86.3
```
1

ip -o -4 addr show | awk -F '[ /]+' '/global/ {print $4}'

atoponce · 2013-04-09 16:34:39 3
1 2 3 > Last ›

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tar pipe to copy files, alternate to cp -Ra

uses tar to dump files from /orignl/path to /dst/dir. i find tar's out more readable than cp, and it doesn't mess with modified dates.

Check difference between two file directories recursively

Numeric zero padding file rename

This uses Perl's rename utility (you may have to call it as prename on your box) and won't choke on spaces or other characters in filenames. It will also zero pad a number even in filenames like "vacation-4.jpg".

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Change wallpaper

Lists architecture of installed RPMs

Lists all installed RPM packages with name and architecture, which is useful to check for compability packages (+ required i386 packages) on a 64bit system.

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Gets the X11 Screen resolution

Requires xrandr, grep and, sed.

Convert JSON to YAML

This is based on __unixmonkey73469__ answer. You will need to supply `--multiline 1` option to JSON importer if your .json is multiline (i.e. it was prettyfied) And you still need catmandu installed via `cpanm Catmandu`

Get a process's pid by supplying its name

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Commands tagged IP (80)

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