Netstat – a command instead of PING and TRACERT to determine whether TCP/IP is working correctly or not. It can help to determine where the problem source is when TCP/IP has problem.
Finger – a command to provide various information about the certain account such as full name of the user, login ID, address and login time etc.
Ping – It is the abbreviation of Packet Internet Gropera command to detect whether a specific IP address is accessible. It is usually used for internet connections troubleshooting. The IP address or domain name follows the “ping” command to execute for checking. e.g. Enter “ping www.yahoo.com” in the command prompt window under the network with connected to internet. In fact, the PING command is to send a packet to the detected IP address or domain and wait for the reply.
Traceroute – a utility helps to trace the packet sending to an internet site with showing how many hops the packet need to reach the host and the time taken. It may figure out where the longest delays occur. e.g. utilize the “traceroute” function of the following website : http://lava.net/support/utilities/traceroute.html
PS – a command that lists the status of processes running on the machine. The “ps gux” may lists only the processes while the “ps aux” lists all the processes running on the machine. e.g. In the UNIX machine, type “ps” command will list the processes. It displays the process ID under “PID”; the control terminal under “TTY”; the state of the process under “S”; the CPU time used by the process under “TIME”; an indication of the “COMMAND” that is running.