linux-pages.com
... arcane linux knowledge collected over the eons, bit by bit ...
Posts by: ench0
Scenario
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You are maintaining several web-sites (site1.com, site2.org, etc…). Having just one web-site at localhost with all files (DocumentRoot) at /var/www/html is not an option for you. You need to be able to test all of them and to access them in a convenient way.
Solution
Setup apache with Virtual Hosts, […]
How can you see which code a module executes when your app calls an ioctl system call?
Consider this situation:
You app gets to the point where it executes an ioctl syscall and returns an error, e.g.
if (ioctl(fd, STVMIX_IOC_DISCONNECTLAYERS, &STVMIX_Ioctl_DisconnectLayers) != 0) { /* IOCTL failed */ ErrorCode = ST_ERROR_BAD_PARAMETER; printf (” STVMIX_DisconnectLayers():Ioctl error […]
Most portable way to administer your printers under Linux is via CUPS’ web interface (CUPS stands for Common Unix Priniting System btw). Every cups server provides this interface, just point your browser to:
The beauty of this solution:
Being a web-bassed interface it available on every Linux distribution is completely independent of […]
Some versions of VLC have this problem: once you enable visualisations it can not be disabled. Yes, there is a radion button in the menu in Audio –> Visualisations which can be set to “Disable” but to no effect – on next start of VLC it displays the visualizations plug-in screen again. Even if you’re […]
How can you remove a mounted USB stick or USB HDD from the list of mounted devices?
PROBLEM
We have all done it – in a hurry you unplug a USB drive which was mounted in your Linux system without properly unmounting it and then it sits there in your list of mounts and you […]
Use imagemagick – this is exactly what it was designed for! 🙂
For example:
– to resize all .jpeg files in the current directory to be 320 pixels wide, preserving the aspect ration, do this:
$ convert ‘*.jpeg[320x]’ resized%03d.jpeg
– to shrink all .jpg files in the current directory […]
When setting up a dual-boot computer or even simply a new Windows computer:
1. Have a Linux Live CD/DVD/USB handy. It’s almost guaranteed that you will need it even if you’re only installing windows.
2. Save the MBR (“Master Boot Record”): Boot your Live linux and in the terminal type:
sudo dd if=/dev/sda […]
This is my current .emacs file. As you can see it’s got lots of goodies – indentation styles when editing code, jumping between parentheses/if/endif keywords, special key-mappings, custom search commands and much more 🙂
