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debian linux

Change Password Using passwd Command Over SSH Based Session

I‘m a new Ubutnu Linux user. I backup files to our corporate Unix backup server using the rsync command. The server only allow to upload/download files. I am unable to login to the server. How do change my password using the passwd command over ssh based session?
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Linux: Find Number of CPU Cores Command

How do I find out the number of CPU cores available under HP x86_64 Linux serer running on RHEL / Debian Linux 6.x?
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Debian Linux (Squeeze) Install Firefox 4

My Debian Linux 6 (64 bit) has Epiphany installed which is the GNOME web browser. Epiphany aims to be simple to use and standards compliant but I want all other Firefox extensions. How do I install the latest version of Firefox 4 under Debian Linux version 6?
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Linux Configure Sendmail as SMTP Mail Client ( submission MTA )

I‘ve central e-mail server. Other servers does not need to operate as a mail server. How do I configure Sendmail as submission-only e-mail server (mail client) under CentOS / Fedora / RHEL / Debian Linux / UNIX like operating systems?
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Ubuntu Linux: Clean aptitude Cache Command

How do I clean the aptitude command cache under Ubuntu or Debian Linux?
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AIDE is an open source host-based intrusion detection system which is a replacement for the well-known Tripwire integrity checker. It provide software integrity checking and it can detect that intrusions (monitor filesystem for unauthorized change such as find out if system binaries modified and a new cracked versions installed or not) have occurred on the system. How do I install and configure AIDE under Ubuntu LTS / Debian Linux 5.0 server?
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Debian / Ubuntu: Apache2 Change Default Port / IP Binding

Question: How do I change Apache 2 default port under Debian / Ubuntu Linux? I’ve couple of public IPv4 address assigned by my ISP, how do I force Apache2 to listen to a specific IP address? How do I change Apache2 IP address binding?
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Debian / Ubuntu Linux Install tracepath / traceroute6 / tracepath6 commands

Q. I’m not able to run tracepath or tracepath6 under Debian Linux. tracepath is default under CentOS Linux. How do I install tracepath command under Debian Linux 4.x server? How do I find out what package owns the command under Debian / Ubuntu Linux?
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How To Set Caching DNS Server

Q. How do I set caching dns server to speed up dns lookup for my LAN (500 PC)? The DNS lookups creating a lot of network activity. There are a few times when this causes performance issues. How do I configure caching dns under Debian Linux?
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How To Secure Apache Proxy Server (mod_proxy)

Q. I’ve proxy (mod_proxy) enabled for Apache under Debian Linux 4.0 server. I’d like to use this to improve performance, but I don’t want an open proxy that can be used by anyone on the Internets? How do I secure my proxy as limiting access is essential as I’m using a forward proxy?
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