The ss
command in Linux is used to display socket statistics. It is similar to the netstat
command, but it is more efficient and provides more information. It can be used to show information about various network connections and protocols, including TCP, UDP, UNIX domain sockets, and more.
Here are some examples of how to use the ss
command:
- Display all TCP connections:
ss -t
- Display all UDP connections:
ss -u
- Display all UNIX domain socket connections:
ss -x
- Display all connections in a specific state:
ss -o state established
- Display statistics for a specific process:
ss -p -i pid 1234
In the first example, the -t
option is used to display all TCP connections. In the second example, the -u
option is used to display all UDP connections. In the third example, the -x
option is used to display all UNIX domain socket connections.
In the fourth example, the -o
option is used to filter the output based on the state of the connection. In this case, only connections in the “established” state will be displayed.
In the fifth example, the -p
option is used to show statistics for a specific process and the -i
option is used to filter by process ID, in this case the process ID is 1234.
It’s worth noting that the ss
command has many other options that can be used to filter and display the socket statistics, you can refer to the ss
man page for more information.
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