My iptables based firewall allows only port TCP 80 and 443. I also need tcp port # 22, but I do not have static IP at my home. How do I open and close TCP port #22 on demand under Debian or Ubuntu Linux based server systems? How do I install a port-knock server called knockd and configure it with iptables to open tcp port #22 or any other ports?
How do I install rubygems package manager for Ruby on rails (RoR) under Debian or Ubuntu Linux operating systems?
I have the following message whenever I use the apt-get command under Debian or Ubuntu Linux:
The following packages were automatically installed and are no longer required:
libaccess-bridge-java libjs-mochikit python-cheetah libjs-excanvas
libaccess-bridge-java-jni sabnzbdplus-theme-smpl tzdata-java
ca-certificates-java
Use ‘apt-get autoremove’ to remove them.
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
How do I fix this issue? Is it safe to remove all unwanted packages?
How do I install Java and C/C++ integrated development environment called Eclipse under Debian GNU/Linux squeeze v6.xx?
I know how to
optimize and compress png images using optipng command. line tool. I have lots of images in JPEG format. How do I compress and optimize JPEG images on my amazon cloud account so that I can save bandwidth on cloudfront cdn account? How do I use an image compressor to create lossless compression on JPEG files, with no effect on image quality in bulk using Linux?
I would like to use argparse module for Python 2.6 under Debian Linux. However, the code is not working. How do I install and use argparse Python module under Debian Linux 6.x for Python version 2.5 or 2.6?
I have Debian / Ubuntu Linux. I need to compile software written in C. The gcc throwing an error that read as follows:
gnu/stubs-32.h: No such file or directory compilation terminated. make: *** [foo.o] Error 1
How do I fix this problem under Debian or Ubuntu Linux 64 bit system and compile apps using gcc compiler?
