HowtoForge provides user-friendly Linux tutorials.
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Security Testing your Apache Configuration with Nikto
Author: xenlab • Tags: apache, security • Comments: 11Security Testing your Apache Configuration with Nikto By now you've got the perfect setup for your new Ubuntu 6.0.6 (Dapper Drake) box. You may have even followed the excellent Intrusion Detection and Prevention with BASE and Snort tutorial. And as an added precaution you installed DenyHosts to prevent hack attempts via ssh. But now that you've got your new LAMP server on the internet, how can you tell that your new web server is secure? You test it, of course!
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Securing the CentOS Server with Bastille and PSAD
Author: treed •
Tags: centos, security •
Comments: 1 Securing the CentOS Perfect Setup with Bastille. This article shows how to secure a CentOS server using psad, Bastille, and some other tweaks. psad is a tool that helps detect port scans and other suspicious traffic, and the Bastille hardening program locks down an operating system, proactively configuring the system for increased security and decreasing its susceptibility to compromise.
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Linux GPRS/EDGE via Bluetooth HOWTO
Author: tdi • Tags: other • Comments: 6Linux GPRS/EDGE via Bluetooth HOWTOIn this guide I will show you howto configure internet access through GPRS/EDGE, using bluetooth connection with your GSM phone. I am using gentoo and Nokia 6310i phone, but this will work with any distribution and any bluetooth capable phone.
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Invalid or corrupt certificate error code -8182, how can i fix it?
Author: admin •
Tags: ispconfig •
Comments: 0 You can re-generate the ISPConfig SSL certificate like this: openssl genrsa -des3 -passout pass:yourpassword -out /root/ispconfig/httpd/conf/ssl.key/server.key2 1024 openssl req -new -passin pass:yourpassword -passout pass:yourpassword -key /root/ispconfig/httpd/conf/ssl.key/server.key2 -out /root/ispconfig/httpd/conf/ssl.csr/server.csr -days 365 openssl req -x509 -passin pass:yourpassword -passout pass:yourpassword -key /root/ispconfig/httpd/conf/ssl.key/server.key2 -in /root/ispconfig/httpd/conf/ssl.csr/server.csr -out /root/ispconfig/httpd/conf/ssl.crt/server.crt -days 365
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How do I search for a term in a file?
Author: admin •
Tags: shell •
Comments: 0 With the grep command. If you want to find out if the term user is in /etc/httpd/conf/httpd.conf, you would run grep -i user /etc/httpd/conf/httpd.conf (-i makes the search case-insensitive). Normally grep does not tell you the line number where it finds the term. If you want to find out the line number, run grep -n -i user /etc/httpd/conf/httpd.conf
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How do I find out who is logged in on my system?
Author: admin •
Tags: shell •
Comments: 0 You can find out about logged in users either by running who (Sample output: server:~# who root pts/0 Nov 12 11:28 (192.168.0.202) ) or w which gives more detailed output: server:~# w 11:29:49 up 2:19, 1 user, load average: 0.02, 0.01, 0.00 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT root pts/0 192.168.0.202 11:28 0.00s 0.08s 0.01s w
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How do I find out which gateway a Linux system is currently using?
Author: admin •
Tags: networking •
Comments: 6 Run route -nee The output will look like this: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface MSS Window irtt 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 0 0 0 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0 0 0 0 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0 0 0 0 This means that the system with the IP address 192.168.0.100 is using 192.168.0.1 as gateway.
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How do I find out if a remote system is still alive, if certain services are running, which processes are running, etc.?
Author: admin •
Tags: linux •
Comments: 0 You can use ping to see if the system is alive: ping -c4 <system's IP address> To see if a certain service is still alive, use the telnet command: telnet <system's IP address> 25 (for SMTP) telnet <system's IP address> 80 (for HTTP) telnet <system's IP address> 110 (for POP3) You can login to the system using SSH (port 22) (use PuTTY if you are on a Windows PC; PuTTY is an SSH client for Windows), and when you are on the system, you have a few useful tools to gather more information:
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Greylisting - fight Spam with Postgrey and Postfix on Debian and Ubuntu
Author: erk •
Tags: antivirus, debian, postfix •
Comments: 9 There are numerous ways to prevent spam from reaching your inbox, the most popular is probably SpamAssassin. Greylisting will not replace spam filtering software like SA but it will serve as a powerful first hurdle for spam thus reducing the ammount of spam entering the system at all.
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Getting Things Done in the New Year
Author: joe • Tags: debian • Comments: 2Getting Things Done in the New Year Author: Joe Topjian <joe [at] adminspotting [dot] net> What a better way to start the New Year off than to get organized. There's this really cool Rails application called Tracks that will give you a web-based management interface for organization. Setting it up is pretty easy, and that's what I'll be going over here.
