Commands tagged Network (129)
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Gets your IP address and has a shorter URL. Show Sample Output
0curl l2.io/ip -
0while true; do curl -vsL -o /dev/null example.com 2>&1 | grep 503 > /dev/null || echo "OK: server is up."; sleep 8; done
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0while curl -dsL example.com 2>&1 | grep 503;do sleep 8;done;echo server up
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Check trough unix sockets if tcp port is open or close Show Sample Output
0(echo >/dev/tcp/localhost/25) &>/dev/null && echo "TCP port 25 open" || echo "TCP port 25 close" -
netstat will list all open ports on the system, unix sockets, tcp sockets and udp sockets. the t flag limits to tcp ports the l flag limits to listening ports and the n flag disables the translation of port to service ( ie :25 displayed instead of :smtp ). then grep for the port you are interested in preceeded by a colon. Show Sample Output
0netstat -tln | grep :25 -
0sudo lsof -iTCP:25 -sTCP:LISTEN
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Using netcat (nc) 25 can be replaced with the friendly value (smtp). Check error code for result or use -v option to echo output nc -z localhost smtp && echo open || echo closed nc -zv host protocol Show Sample Output
0nc -zv localhost 25 -
The sed script ensures that the "random" MAC address is unicast (bit 0 of first byte == 0) and local (bit 1 of first byte == 1)
0openssl rand -hex 6 | sed 's/\(..\)/:\1/g; s/^.\(.\)[0-3]/\12/; s/^.\(.\)[4-7]/\16/; s/^.\(.\)[89ab]/\1a/; s/^.\(.\)[cdef]/\1e/' -
The files are automatically uncompressed when they reach the destination machine. This is a fast way to backup your server to your local computer while it's running (shutting down services is recommended). A file named "exclude.txt" is needed at /tmp/ containing the following : /dev/* /media/* /mnt/* /proc/* /sys/* /tmp/* /home/*/.local/share/Trash /home/*/.gvfs /home/*/.cache /home/*/.thumbnails /etc/fstab /lib/modules/*/volatile/.mounted /var/run/* /var/lock/* /var/tmp/* /var/cache/apt/archives/* /lost+found/* Show Sample Output
0tar -cj / -X /tmp/exclude.txt | cstream -v 1 -c 3 -T 10 | ssh user@host 'tar -xj -C /backupDestination' -
Gives the DNS listed IP for the host you're on... or replace `hostname` with any other host Show Sample Output
0host `hostname` | rev | cut -d' ' f1 | rev -
It will list your machine's ethernet ports speed Show Sample Output
0for d in $(cd /sys/class/net && echo eth?) ; do echo "$d: $(ethtool $d |grep -w Speed)"; done -
Fast and simple. Details: http://api.ident.me Show Sample Output
0curl http://ident.me -
0curl whatismyip.akamai.com && echo
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start wifi connectionsudo service network-manager start stop wifi connectionsudo service network-manager stop0sudo service network-manager start -
This server can be access by a browser or other remote terminal with ncat. I have to use de test && break to allow ctrl-c to close. Show Sample Output
0while [ 1 ]; do cat /dev/urandom | tr -dc ' -~' | head -c 10 | ncat -l 8080 &> /dev/null; test $? -gt 128 && break; done -
0$ curl -L ipconfig.me
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0curl checkip.amazonaws.com
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-1/usr/sbin/arp -i eth0 | awk '{print $3}' | sed 1d
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Same thing as above, just uses fetch and ipchicken.com Show Sample Output
-1fetch -q -o - http://ipchicken.com | egrep -o '([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}' -
This command uses the top voted "Get your external IP" command from commandlinefu.com to get your external IP address. Use this and you will always be using the communities favourite command. This is a tongue-in-cheek entry and not recommended for actual usage.
-1eval $(curl -s http://www.commandlinefu.com/commands/matching/external/ZXh0ZXJuYWw=/sort-by-votes/plaintext|sed -n '/^# Get your external IP address$/{n;p;q}') -
same thing as the other
-1ipcalc $(ifconfig eth0 | grep "inet addr:" | cut -d':' -f2,4 | sed 's/.+Bcast:/\//g') | awk '/Network/ { print $2 } ' -
Request all information about my IP address in xml format
-1curl ifconfig.me/all/xml -
Find your default gateway and print it directly output. http://www.bayner.com/ kerim@bayner.com Show Sample Output
-1ip route show | awk '$3 ~ /^[1-9]+/ {print $3;}' -
-1route -n | grep "^0\." | awk '{print "Gateway to the World: "$2", via "$NF""}'
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Additionally it may give your geolocation if it's known by hostip.info Show Sample Output
-1curl http://my-ip.cc/host.txt - ‹ First < 2 3 4 5 6 >
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