Difference between revisions of "Shells ports"
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| − | + | === Open ports === | |
:As a shell user there is a range of ports you may use to run services, this range is port '''5000''' to '''5500'''. (Both tcp and udp) | :As a shell user there is a range of ports you may use to run services, this range is port '''5000''' to '''5500'''. (Both tcp and udp) | ||
| − | + | === Help! Someone is using my port! === | |
:Ports are shared resources, if you're not using yours for a bit, someone else may take the port you were using before. | :Ports are shared resources, if you're not using yours for a bit, someone else may take the port you were using before. | ||
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| − | + | === That doesn't seem fair? I was using it first. === | |
:Well, in all honesty every user has as much right to a specific port as the next. | :Well, in all honesty every user has as much right to a specific port as the next. | ||
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| − | + | === port command === | |
:There is a custom made command available from your shell to check which ports are in use. | :There is a custom made command available from your shell to check which ports are in use. | ||
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| − | + | ==== Usage of the port command ==== | |
:port -a will show you the available ports | :port -a will show you the available ports | ||
:port -s <port> will check if that port is available to you | :port -s <port> will check if that port is available to you | ||
| − | + | ==== Examples of how to use the port command ==== | |
:Find out if port 5001 is in use:<br /> | :Find out if port 5001 is in use:<br /> | ||
Revision as of 14:53, 25 February 2011
Contents
Open ports
- As a shell user there is a range of ports you may use to run services, this range is port 5000 to 5500. (Both tcp and udp)
Help! Someone is using my port!
- Ports are shared resources, if you're not using yours for a bit, someone else may take the port you were using before.
- If you have a good reason to lay claim to a specific port, please contact an admin and we'll see what can be done.
That doesn't seem fair? I was using it first.
- Well, in all honesty every user has as much right to a specific port as the next.
- Based on this, the only fair and maintainable system at this point is simply 'first come, first served'.
port command
- There is a custom made command available from your shell to check which ports are in use.
- This is the 'port' command.
Usage of the port command
- port -a will show you the available ports
- port -s <port> will check if that port is available to you
Examples of how to use the port command
- Find out if port 5001 is in use:
coolfire@Lydia:~$ port -s 5001 State for port 5001: In use Process info: - Done. coolfire@Lydia:~$
- What you can see here is that port number 5001 is in use already.
- You are not given any information about what process is running on the port as you are not root.
