Linux, PHP, LAMP, The Web in a blog- Android – how to develop directly on a phone
- Android drawable default icons – they are free to use
- Android how to read and write files
- Uncompress on the fly when copying a file from a remove location with scp
- Setting up an encrypted volume on an external hard drive on CentOS
- Linux bash – tar tricks
- Implement Selenium tests
- Using a downloaded package without IDE in Java
- CSS selectors optimisation
- Ubuntu Linux on Acer Aspire AO751h
Category Archives: Linux
Rolling Back yum Packages – CentOS Roll Back After Installation
Rolling back yum packages: http://dailypackage.fedorabook.com/index.php?/archives/17-Wednesday-Why-Repackaging-and-Rollbacks.html http://www.vincentverhagen.nl/2007/12/10/how-to-roll-back-packages-on-centos-5-rhel-5/ When you’ve installed/updates packages with yum or rpm, you can quite easily roll back the updates/installations using rpm. For this, yum and rpm need to save roll back information, which they do not do … Continue reading
Posted in Redhat / CentOS, System Maintenance
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PHP – Execute Linux Commands
There are 4 functions: _ exec _ system _ passthru _ shell_exec They basically differ for the return. The best seems to be the last one, if you need the whole command output in your PHP script.
Posted in Linux Command Line, PHP
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SSH Without Password
Use Public/Private Keys for Authentication Using encrypted keys for authentication offers two main benefits. Firstly, it is convenient as you no longer need to enter a password (unless you encrypt your keys with password protection) if you use public/private keys. … Continue reading
List Which Ports Are Listening – Open Ports – Open Connections
This is the most reliable method because is actually scans the ports: nmap -sT -O localhost Other methods based on internal checks that give you also the information about the program using the ports: netstat -anp lsof -i
APC – Installing It On CentOS
yum install php-pear yum install php-devel yum install httpd-devel Edit the file /usr/share/pear/pearcmd.php and add the following at the beginning: @ini_set(‘memory_limit’, ’16M’); otherwise you’ll probably get a fatal error whilst building the extension: pecl install apc Now configure PHP to … Continue reading
Posted in LAMP Server Setup, Linux, Web Development
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Building Scalable Web Sites – Scalability
A scalable system has got 3 simple characteristics: The system can accommodate increased usage The system can accomodate an increased dataset The system is maintainable It’s not about speed or complexity, those are other topics. For exampel, this is a … Continue reading
Posted in Linux, Linux Command Line, Microsoft, Web Development
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Linux: How To Count The Number Of Files Under a Directory
find . -type f | wc -l
Posted in Linux Command Line
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Linux – Cut Lines
Very useful when you pipe it, for example, for easily reading a file containing very long quries cat queries.sql | cut -b -10
MySQL – Importing Many SQL Dump Files in a Database
ls *.sql | awk ‘{printf(“mysql -u [username] -p[password] [databasename] < %s\n”, $1) | “/bin/sh” }’
Posted in Linux Command Line, MySQL
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CentOS – Setting the Network / Internet Interface
http://www.cyberciti.biz/faq/rhel-centos-fedoracore-linux-network-card-configuration/
Posted in Redhat / CentOS
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