setuid and setgid confusion
I’m trying to fully grasp the concept of setuid and setgid, and I’m not quite sure in what way permissions are actually elevated. Let me provide an example:
Unix & Linux
octal dump of directory
I got a copy of The Unix Programming Environment by Kernighan and Pike from a garage sale. I’m very interested in the chapter about the UNIX filesystem. Naturally, I also found this passage very interesting:
How can I access a deleted open file on Linux (output of a running crontab task)?
I have an hourly hour-long crontab job running with some mtr (traceroute) output every 10 minutes (that is going to go for over an hour prior to it being emailed back to me), and I want to see the current progress thus far.
Issue with column command and color escape codes
I’m colorizing the header of a table formatted with column -ts $'t'
Is it possible to change the order of a glob?
I am trying to show all instances of a particular message from the syslog in chronological order by doing something like the following:
Why should ‘Character Classes’ be preferred over ‘Character Ranges’ In Shell (Bash)?
The Linux Command Line (Book – page count 47) says:
How to remove a USB drive without worry if its been unmounted?
Sometimes I unplug my usb drive only to find out files were not written to it.
What are the side effects of having several UNIX users share one UID?
The sys-apps/shadow package on my GNU / Linux system comes with a useradd command that supports an option that I have previously overlooked: --non-unique. For the sake of convenience when shellig home from the university, I have created an alias for my original username (casual name at home) thusly:
How to stop filesystem check (fsck) on boot?
Once in a while (every 30-th boot) my linux system decides to check filesystem for errors. I am ok with this – what needs to be done needs to be done.
Fedora’s command-not-found doesn’t work
I’ve recently installed Fedora 19. Packagekit-command-not-found is installed. But its own examples don’t work. When I enter gedti the output is: