4th Floor, 4 Tabernacle Street London EC2A 4LU

Our Blogs

SCCS Commands

SCCS Commands sccs Subcommands Checking Files In and Out The following subcommands are useful when retrieving versions or checking in changes. Checking Out a File for Editing: sccs edit 1 To edit a source file, you must check it out first using sccs edit. SCCS responds with the delta ID of the version just retrieved, […]

Setting up SSH public/private keys

Setting up SSH public/private keys SSH (Secure Shell) can be set up with public/private key pairs so that you don’t have to type the password each time. Because SSH is the transport for other services such as SCP (secure copy), SFTP (secure file transfer), and other services (CVS, etc), this can be very convenient and […]

Checking Memory on UNIX

Checking Memory on UNIX [bash]ps -A –sort -rss -o comm,pmem | head -n 11[/bash] [bash]ps -auxf | sort -nr -k 4 | head -10[/bash] [bash]free[/bash] [bash]free -m[/bash] [bash]ps aux | awk ‚Äò{sum +=$4}; END {print sum}‚Äô[/bash]

Have Twitter update your Facebook profile

Have Twitter update your Facebook profile Have twitter update your facebook status: Here’s how. 1. Get the Twitter application installed in your Facebook profile here: Twitter App For Facebook. 2. You’ll notice a link that says: Want Twitter to update your Facebook status? Click here!

CPAN – Perl Command Line

CPAN – Perl Command Line There are several ways to get Perl modules from CPAN installed on your unix-based system. Keep in mind that there is always more than one way to do it with Perl, and this is no different. Before embarking upon any installation, it’s a good idea to download the module, unzip […]

Install Google Mod Speed on Ubuntu / Debian

Install Google Mod Speed on Ubuntu / Debian mod_pagespeed is an open-source Apache module that automatically optimizes web pages and resources on them. It does this by rewriting the resources using filters that implement web performance best practices. Webmasters and web developers can use mod_pagespeed to improve the performance of their web pages when serving […]

Oracle Solaris 11 Overview

Oracle Solaris 11 Overview Production ready release delivering leading operating system technology innovation to improve availability, efficiency, scalability, performance, and security in the data center. What’s New Documentation System Requirements FAQ Oracle Solaris 11 Express raises the bar on the functionality introduced in Oracle Solaris 10, continuing Oracle’s leadership for providing the best choice for […]

Perl – Execute Command With Timeout

Perl – Execute Command With Timeout [perl] my $command_to_check = “$SSH_CON $host $SSH_CMD”; if (! execute_command($command_to_check)) { next; } sub execute_command($) { ### Executes a command with timeout ### Returns 0 if fails ### Returns 1 on success my $command=shift; my $timeout=30; eval { local $SIG{ALRM} = sub{die;}; my($oalarm) = alarm($timeout); $result=`$command 2>&1`; if ($? […]