Solaris-Unix

One of the most common ways for hackers to break into a Solaris system is to exploit buffer overflows. How do I turn on buffer overflow protection under Solaris UNIX operating system just like CentOS/Redhat Linux system?

{ 2 comments }

My ISP requires that mail from my dynamic IP to our small business email addresses uses their outgoing SMTP servers. This is probably done to reduce abuse and spam but now I’m not able to send email and local Postfix log file displays authentication failure message. How do I relay mail through my mail ISP servers using Postfix SMTP under Linux / UNIX like operating systems?

{ 25 comments }

My squid proxy server is displaying system’s real IP address. I’ve a corporate password protected squid proxy server located at 202.54.1.2. My clients works from home or offices via A/DSL / cable connections. Squid should hide all system’s IP address, but it is forwarding and displaying the system’s IP address. How do I configure squid to hide client’s real IP address?

{ 9 comments }

I am on Red Hat Enterprise Linux 5.x server. Is there is an easy way to run script or command at boot time after fresh reboot command?

{ 9 comments }

I am trying to use xargs command using shell pipes and not able to understand how to control and use command line arguments. For example I’d like to find out all *.c file located in 100s of sub-directories and move them to another directory called ~/old.src. How do I use command line args with xargs to achieve the same?

{ 49 comments }

How do I redirect output and errors to /dev/null under bash / sh shell scripting? How do I redirect the output of stderr to stdout, and then redirect this combined output to /dev/null?

{ 20 comments }

I know how to use old banner command to print a large, high quality banner on the screen or printer. Recently, I saw colorful banner on friends laptop. How do I display large colourful characters on screen, especially on terminal? How do I create colorful text banners on screen?

{ 16 comments }