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dnsquery......Query DNS Server
dnsquery option(s)
PURPOSE
The dnsquery command queries nameservers via BIND resolver library calls.
OPTIONS
| -n nameserver | Specifies the nameserver, either by IP addresses or domain name. | |
| -t type | Sets the type of resource record of interest, one of the following: | |
| A | address | |
| NS | nameserver | |
| CNAME | canonical name | |
| PTR | domain-name pointer | |
| SOA | start of authority | |
| WKS | well-known service | |
| HINFO | host information | |
| MINFO | mailbox information | |
| MX | mail exchange | |
| RP | responsible person | |
| MG | mail group member | |
| AFSDB | DCE or AFS server | |
| ANY | wildcard | |
| -c class | Sets the class of resource records of interest, one of the following: | |
| IN | Internet | |
| HS | Hesiod | |
| CHAOS | Chaos | |
| ANY | wildcard | |
| -p num | Specifies the period to wait before timing out. | |
| -r num | Sets the number of times to retry if the nameserver doesn’t respond. | |
| -s | Uses a stream rather than a packet. | |
faucet......Network Pipe Repair
faucet option(s) port
PURPOSE
The faucet command is a fixture for a BSD network pipe, providing the functionality of pipes over the network. It behaves as the server end of a server-client connection and works well with hose, especially when you don’t have easy access to the destination account (such as a root account where .rhosts are a bad idea). Basically, faucet creates a BSD socket, binds it to the port specified on the command line, and listens for connections. Every time faucet gets a connection, it runs command and its args.
WARNING: The faucet command is not considered to be a very secure method of networking. Use with caution.
OPTIONS
There are many more options with this command; these are the most frequently used. Check the online-manual page for a full listing.
| -localhost | Specifies that the listening socket should be bound to a specific Internet address on the local host. |
| -daemon | Specifies that faucet should disassociate from the controlling terminal once it has started listening on the socket, using the setsid() system call. |
| -shutdown | Turns the bidirectional socket into a unidirectional socket. |
| -serial | Tells faucet to wait for one child to finish before accepting any more connections. |
| -pidfile filename | Write its process ID into filename. |
fuser......File Users
fuser option(s) filename(s)
PURPOSE
The fuser filename lists the process IDs of those, using a particular file or filesystem. Information returned includes the following:
| c | Current directory |
| e | Executable file |
| f | Open file |
| m | Mapped file or shared library |
| r | Root directory |
OPTIONS
| - | Resets options to defaults. |
| -signal | Sends a signal to a process. Use -l to see a list of the signal names. |
| -a | Shows all files, not just the ones being accessed. |
| -k | Kills all the processes accessing the file. |
| -l | Returns a list of the signal names. |
| -m | Returns information about a mounted filesystem. |
| -s | Runs in silent mode. |
| -u | Returns names of the users of the processes. |
| -v | Works in verbose mode, returning process ID, username, command name, and access fields. |
getpeername......Get Peername
getpeername option(s)
PURPOSE
The getpeername returns information about a socket connection.
OPTIONS
| fd | Specifies file descriptors. |
| -verbose | Returns more detailed information. |
hose......End of Network Pipe
hose option(s)
PURPOSE
The hose command is a fixture for a BSD network pipe, providing the functionality of pipes over the network. It behaves as the client end of a server-client connection and works well with faucet, especially when you don’t have easy access to the destination account (such as a root account, where .rhosts are a bad idea). Basically, hose creates a BSD socket, binds it to the port specified on the command line, and listens for connections. Every time hose gets a connection, it runs command and its args.
WARNING: The faucet command is not considered to be a very secure method of networking. Use with caution.
OPTIONS
There are many more options with this command; these are the most frequently used. Check the online-manual page for a full listing.
| -delay n | Specifies how many n seconds to wait between tries. |
| -retry n | Specifies that connections should be retried n times. |
| -shutdown r | Makes it a read-only socket. |
| -shutdown w | Makes it a write-only socket. |
| -unix | Specifies that port is not an Internet port number or service name, but rather a filename for a UNIX domain socket. |
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