Commands tagged port sorted by votes

Commands tagged port (20)

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rsync instead of scp

The command copies a file from remote SSH host on port 8322 with bandwidth limit 100KB/sec; --progress shows a progress bar --partial turns partial download on; thus, you can resume the process if something goes wrong --bwlimit limits bandwidth by specified KB/sec --ipv4 selects IPv4 as preferred I find it useful to create the following alias: alias myscp='rsync --progress --partial --rsh="ssh -p 8322" --bwlimit=100 --ipv4' in ~/.bash_aliases, ~/.bash_profile, ~/.bash_login or ~/.bashrc where appropriate. Show Sample Output
This is sample output - yours may be different.
```
temp.tar.gz
       20002 100%   19.08MB/s    0:00:00 (xfer#1, to-check=0/1)

sent 204 bytes  received 192 bytes  88.00 bytes/sec
total size is 20002  speedup is 50.51
```
17

rsync --progress --partial --rsh="ssh -p 8322" --bwlimit=100 --ipv4 user@domain.com:~/file.tgz .

ruslan · 2011-02-10 14:25:22 12
Show what PID is listening on port 80 on Linux
This is sample output - yours may be different.
17

fuser -v 80/tcp

pykler · 2011-12-16 14:51:34 4
Port scan a range of hosts with Netcat.

Simple one-liner for scanning a range of hosts, you can also scan a range of ports with Netcat by ex.: nc -v -n -z -w 1 192.168.0.1 21-443 Useful when Nmap is not available:) Range declaration like X..X "for i in {21..29}" is only works with bash 3.0+ Show Sample Output
This is sample output - yours may be different.
```
(UNKNOWN) [192.168.0.21] 443 (?) : Connection refused
(UNKNOWN) [192.168.0.22] 443 (?) open
(UNKNOWN) [192.168.0.23] 443 (?) : Connection refused
(UNKNOWN) [192.168.0.24] 443 (?) open
....
...
```
9

for i in {21..29}; do nc -v -n -z -w 1 192.168.0.$i 443; done

rez0r · 2009-09-25 03:31:29 12
Windows telnet

Check if TCP port is reacheable Show Sample Output
This is sample output - yours may be different.
```
ComputerName     : ecample.com
RemoteAddress    : 192.168.1.59
RemotePort       : 443
InterfaceAlias   : SRV-37
SourceAddress    : 192.168.1.10
TcpTestSucceeded : True
```
2

Test-NetConnection -ComputerName example.com -Port 443

EBAH · 2021-09-16 16:11:04 235
Show what PID is listening on port 80 on Linux
This is sample output - yours may be different.
1

lsof -nPi tcp:80

arighi · 2012-01-09 09:35:17 6
test connection to a remote IP / port

-z: Specifies that nc should just scan for listening daemons, without sending any data to them -u: Use UDP instead of the default option of TCP. Show Sample Output
This is sample output - yours may be different.
```
# nc -zu 10.162.155.17 4670
Connection to 10.162.155.17 4670 port [udp/*] succeeded!
```
0

nc -z <IP> <TCP port> OR nc -zu <IP> <UDP port>

frank514 · 2011-04-01 04:08:53 5

shows opened ports on machine in continuous mode (refreshing every 10 sec) Show Sample Output

This is sample output - yours may be different.

tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      -
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6010          0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6011          0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6012          0.0.0.0:*               LISTEN      -
tcp        0      0 :::111                  :::*                    LISTEN      -
tcp        0      0 :::5556                 :::*                    LISTEN      20921/java
tcp        0      0 :::22                   :::*                    LISTEN      -
tcp        0      0 ::1:631                 :::*                    LISTEN      -
tcp        0      0 127.0.0.2:7001          :::*                    LISTEN      20842/java
tcp        0      0 127.0.0.1:7001          :::*                    LISTEN      20842/java
tcp        0      0 10.249.135.171:7001     :::*                    LISTEN      20842/java
tcp        0      0 ::1:7001                :::*                    LISTEN      20842/java
tcp        0      0 fe80::7a2b:cbff:fe:7001 :::*                    LISTEN      20842/java
tcp        0      0 ::1:25                  :::*                    LISTEN      -
tcp        0      0 ::1:6010                :::*                    LISTEN      -
tcp        0      0 ::1:6011                :::*                    LISTEN      -
tcp        0      0 ::1:6012                :::*                    LISTEN      -
udp        0      0 0.0.0.0:111             0.0.0.0:*                           -
udp        0      0 0.0.0.0:631             0.0.0.0:*                           -
udp        0      0 0.0.0.0:670             0.0.0.0:*                           -
udp        0      0 0.0.0.0:26791           0.0.0.0:*                           -
udp        0      0 0.0.0.0:5353            0.0.0.0:*                           -
udp        0      0 0.0.0.0:39640           0.0.0.0:*                           -
udp        0      0 :::111                  :::*                                -
udp        0      0 :::546                  :::*                                -
udp        0      0 :::670                  :::*                                -
udp        0      0 :::43339                :::*                                -
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      -
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6010          0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6011          0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:6012          0.0.0.0:*               LISTEN      -
tcp        0      0 :::111                  :::*                    LISTEN      -
tcp        0      0 :::5556                 :::*                    LISTEN      20921/java
tcp        0      0 :::22                   :::*                    LISTEN      -
tcp        0      0 ::1:631                 :::*                    LISTEN      -
tcp        0      0 127.0.0.2:7001          :::*                    LISTEN      20842/java
tcp        0      0 127.0.0.1:7001          :::*                    LISTEN      20842/java
tcp        0      0 10.249.135.171:7001     :::*                    LISTEN      20842/java
tcp        0      0 ::1:7001                :::*                    LISTEN      20842/java
tcp        0      0 fe80::7a2b:cbff:fe:7001 :::*                    LISTEN      20842/java
tcp        0      0 ::1:25                  :::*                    LISTEN      -
tcp        0      0 ::1:6010                :::*                    LISTEN      -
tcp        0      0 ::1:6011                :::*                    LISTEN      -
tcp        0      0 ::1:6012                :::*                    LISTEN      -
udp        0      0 0.0.0.0:111             0.0.0.0:*                           -
udp        0      0 0.0.0.0:631             0.0.0.0:*                           -
udp        0      0 0.0.0.0:670             0.0.0.0:*                           -
udp        0      0 0.0.0.0:26791           0.0.0.0:*                           -
udp        0      0 0.0.0.0:5353            0.0.0.0:*                           -
udp        0      0 0.0.0.0:39640           0.0.0.0:*                           -
udp        0      0 :::111                  :::*                                -
udp        0      0 :::546                  :::*                                -
udp        0      0 :::670                  :::*                                -
udp        0      0 :::43339                :::*                                -

netstat -tulpnc

altern · 2011-04-20 07:30:31 6

Check a port's state on a given host

Check to see if a port is open or closed on a given host. Show Sample Output

checkport() { sudo nmap -sS -p $1 $2 }

peterRepeater · 2011-12-13 11:46:15 8

Listen on an arbitrary port

Simple way to test if a port is available to the public. Run this command on the "server" and run a `telnet host-ip port-number` on the client. Test by sending strings to the server, which will be displayed in the server terminal.
This is sample output - yours may be different.
0

nc -l <port-number>

cybertoast · 2013-03-20 15:25:57 7
Macports update and clean all packages
This is sample output - yours may be different.
0

sudo port selfupdate && sudo port upgrade outdated && sudo port clean --all installed && sudo port -f uninstall inactive

noah · 2013-06-26 01:12:33 11
Check if TCP port 25 is open

Check trough unix sockets if tcp port is open or close Show Sample Output
This is sample output - yours may be different.
```
TCP port 25 close
```
0

(echo >/dev/tcp/localhost/25) &>/dev/null && echo "TCP port 25 open" || echo "TCP port 25 close"

YouM · 2013-11-12 02:11:01 9
Check if TCP port 25 is open

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
This is sample output - yours may be different.
```
tcp     0     0 127.0.0.1:25     0.0.0.0:*      LISTEN
```
0

netstat -tln | grep :25

Peteches · 2013-11-12 16:47:06 7
Check if TCP port 25 is open
This is sample output - yours may be different.
0

sudo lsof -iTCP:25 -sTCP:LISTEN

pdxdoughnut · 2013-11-12 17:32:34 7
Check if TCP port 25 is open

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
This is sample output - yours may be different.
```
Connection to localhost 25 port [tcp/smtp] succeeded!
```
0

nc -zv localhost 25

toaster · 2013-11-21 22:04:00 11
Check if a port is open to the internet using canyouseeme.org

For now just returns either "Success" or "Error". My awk-fu isn't strong enough to hackily parse out the error in case there is one, so I kept it simple. Show Sample Output
This is sample output - yours may be different.
```
~ user@host
&#10095; cysm 80
Success

~ user@host
&#10095; cysm 443
Error
```
0

cysm() { curl -sd port="$1" http://canyouseeme.org |grep -o 'Success\|Error' }

awh · 2014-11-11 23:30:39 51
[windows] list the open ports by port and display their PID
This is sample output - yours may be different.
0

netstat -anop tcp | find ":8010"

ferantivero · 2014-12-23 13:04:54 8
List open ports on a local Linux system

To list open ports on a local Linux system that are transferring data To list only the IPv4 connections, then replace "-i" with "-i4", and to list only IPv6, use "-i6"
This is sample output - yours may be different.
0

lsof -Pnl -i

olto · 2015-11-10 07:06:45 15
Generate random port number

`shuf` generate random permutations. `-i`, `--input-range=LO-HI` and `-n`, `--head-count=COUNT` output at most COUNT lines Show Sample Output
This is sample output - yours may be different.
```
57459
```
-1

shuf -i 1024-65535 -n 1

pabloab · 2024-02-19 22:02:25 110
Check if TCP port 25 is open
This is sample output - yours may be different.
-2

sudo lsof -iTCP:25

netaxiz · 2013-11-20 08:26:37 10
Check if TCP port 25 is open
This is sample output - yours may be different.
-2

netstat -lntp

fr00tyl00p · 2013-11-20 10:02:10 7

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Are the two lines anagrams?

This works by reading in two lines of input, turning each into a list of one-character matches that are sorted and compared.

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

diff two svn repos ignoring spaces,tabs and svnfiles

creeate file named after actual date

Create a file with actual date as filename

a function to create a box of '=' characters around a given string.

First argument: string to put a box around. Second argument: character to use for box (default is '=') Same as command #4948, but shorter, and without the utility function.

list files recursively by size

Change the From: address on the fly for email sent from the command-line

It's very common to have cron jobs that send emails as their output, but the From: address is whatever account the cron job is running under, which is often not the address you want replies to go to. Here's a way to change the From: address right on the command line. What's happening here is that the "--" separates the options to the mail client from options for the sendmail backend. So the -f and -F get passed through to sendmail and interpreted there. This works on even on a system where postfix is the active mailer - looks like postfix supports the same options. I think it's possible to customize the From: address using mutt as a command line mailer also, but most servers don't have mutt preinstalled.

List docker volumes by container

Ergo browsing 'pacman' queries (Arch)

Alternative1 (grep support): pacman -Ss python | paste - - | grep --color=always -e '/python' | less -R Alternative2 (eye-candy, no grep): pacman --color=always -Ss "python" | paste - - | less -R in ~/.bashrc: pkg-grep() { pacman -Ss "$1" | paste - - | grep --color=always -e "${2:-$1}" | less -R ; } pkg-search() { pacman --color=always -Ss "python" | paste - - | less -R; }

Join lines

Even shorter. Stolen from comment posted by eightmillion.

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Commands tagged port (20)

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