VI Commands

Fixed Service Proxy

Fixed Service Proxy This service subcommand establishes a service-independent relationship between an apparent IP Address on a public interface, and an actual IP Address on the private side. Any service request from the public area that is addressed to the apparent IP Address is redirected to the actual service provider on the private network. Conversely, … Continue reading →

Port Service Proxy

Port Service Proxy This service subcommand establishes a service-specific relationship between an apparent IP Address/Port Number/Protocol (UDP or TCP) combination on a public interface and an actual IP Address/Port Number combination on a private interface. Any service request from the public area that is addressed to the apparent IP Address/Port Number combination is redirected to … Continue reading →

Commands You Should Never Run on Linux

Linux’s terminal commands are powerful, and Linux won’t ask you for confirmation if you run a command that won’t break your system. It’s not uncommon to see trolls online recommending new Linux users run these commands as a joke. Learning the commands you shouldn’t run can help protect you from trolls while increasing your understanding … Continue reading →

Use extended ping and extended traceroute to better troubleshoot your Cisco network

Takeaway: Every admin is familiar with the well-known troubleshooting commands ping and traceroute. David Davis shows you how to use these commands in their extended versions to become an expert at troubleshooting your Cisco network. What can extended ping do for you? The ping command is just about as simple as it gets when it comes … Continue reading →

RIP

RIP is a dynamic, distance vector routing protocol based around the Berkely BSD application routed and was developed for smaller IP based networks. RIP uses UDP port 520 for route updates. RIP calculates the best route based on hop count. Like all distance vector routing protocols, RIP takes some time to converge. While RIP requires … Continue reading →

Network Troubleshooting Commands

Troubleshooting computer network is among the most important job descriptions of the network administrators, system administrators, network technicians and the IT consultants. A computer network can have different kinds of problems such as it can be infected with virus and spyware, attacked by hackers, accessed by unauthorized users and may face connectivity failure issues due … Continue reading →

Basic LINUX commands

Basic Navigation File Manipulation More File Manipulation Account Maintenance File Archival Basic Navigation ls directory listing ls Basic listing ls -F Basic listing, with file type notations (-F) ls -al Listing, showing all, including hidden, files (-a) in long format (-l), which includes permissions, modify dates, ownership, etc cd change directory cd or cd ~ Change to … Continue reading →

Comandos MS-DOS [SP]

ATTRIB Muestra los atributos de los ficheros, y los cambia si se lo indicamos Sintaxis attrib [{+r|-r}] [{+a|-a}] [{+s|-s}] [{ +h|-h}] [[unidad:][rutaDeAcceso] nombreDeArchivo] [/s[/d]] Parámetros          +r Establece el atributo de archivo de sólo lectura. -r Quita el atributo de archivo de sólo lectura. +a Establece el atributo de modificado. -a Quita el atributo de modificado. +s … Continue reading →