Restrictions: if /etc/cron.allow exists only users listed within can access crontab if it does not exists everybody can use crontab, as far as its name is not listed in /etc/cron.deny (1 user per line) if this does not exist neither everybody can use crontab Commands: to specify the editor to be used export EDITOR=pico to [...]

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programs: nLite, cdimage (Microsoft), cdimage gui (beta3 by Cyberian) extract the image contents with IsoBuster, UltraISO or equivalent extract CD Boot Sector with IsoBuster use nLite to perform changes and shrinks copy i386/txtsetup.sif to the boot dirrectory CD:/ of the windows version you have tweaked edit txtsetup.sif and find field [setup data] setupsourcepath= “\” replacing [...]

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- A – Place the program shortcut into the Autorun folder in Start -> Programs – B – Create a key in HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run – C – Run the program as a system service create with regedit a folder in: HKLM\system\controlset[n]\services\[servicename] create a few keys of the following type: displayname [reg_sz] errorcontrol [dword] image patch [expand_sz] [...]

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What is a Runlevel (Wikipedia) on Ubuntu (being Debian based) starting from 6.10 (Edgy Eft)  Upstart is used as a replacement for the traditional init-process. However traditional init scripts and Upstart’s SysV-rc compatibility tools are still used to start most services and emulate runlevels. To change the currently running runlevel use telinit [n] to change [...]

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in order to ease work on the terminal shell linux enables you to set aliases of complex commands. this can be done in different ways – temporary alias pico=’pico -w’ or alias pico=”pico -w” – permanent editing $HOME/.bashrc or $HOME/.bash_aliases and write down the alias strings at the bottom ot the files – to show [...]

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concept: only 1 foreground program can be running on a shell terminal, however several can run in the background. Here’s how.

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This howto focuses on a fast deployment of secure (APOP) Qpopper email pop3 server. This howto is just a scratch, and does not want to be complete nor faultless.

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this is how to use the find command to search for files on a time basis, i.e. to search for files more recent than a certain date or time create an empty file with an arbitrary date and time (which will correspond to t0 of our search) touch -t yyyymmddhhmm [filename] find -newer [filename] you [...]

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You may need to set a maximum disk quota per user, so that one user cannot fill up the whole system with his documents/garbage. A disk quota is a limit set by a system administrator that restricts certain aspects of file system usage on modern operating systems. There are two basic types of disk quotas. [...]

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Hosts files keep the forced associations between DNS and IPs. on linux /etc/hosts on windows 9x %windows%\hosts on windowsNT (2k,XP,vista,ecc.) %windows%\system32\drivers\etc\hosts Editing the hosts file can be useful for a few reasons: this way you don’t need to have registered an IP address to a DNS provider you can force (tough only locally) the redirection [...]

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