The Linux shell offers many ways to compress files for backup. The tar or tape archive program will concantenate many files into one. tar –create –verbose myfile.tar file1 file2 file3 file4tar –create –verbose myfile.tar file1 file2 file3 file4 Then you may use either the gzip or bzip commands to compress the myfile.tar file you have … Read more
Very useful .cshrc file that will also work with the tcsh shell on Linux and UNIX. This gives you a nice prompt and a lovely colored ls output. This .cshrc file requires a .complete file for proper functioning, this is available here: http://www.securitronlinux.com/files/complete.tar.gz. # /etc/csh.login: This file contains login defaults used by csh and tcsh. … Read more
The Linux command-line has many powerful tools for viewing and managing running processes on your UNIX/Linux machine. The lsof command is a very useful command, it will display a list of all open files owned by active processes running on your system. Below is an excerpt from the output this command will give you. root@deusexmachina:/home/neo# … Read more
Changing permissions of a file. To add executable permissions for all categories of a file, you would use chmod a+x foo. To add executable permissions for only the current user, you would use: chmod go-wx foochmod go-wx foo Or you could use chmod +x: chmod +x foochmod +x foo That is a simpler way of … Read more
http://www.securitronlinux.com/uncategorized/tron-legacy-unix-operating-system/. As seen in this posting above, the Tron Legacy movie used computers with a variant of the Solaris UNIX operating system. The ps -ef command works in the FreeBSD UNIX distribution, you need to mount procfs with this command: mount -t procfs proc /proc this will enable the proc file-system. The login -n root … Read more
Using the vmstat command to see which hard disk partitions are the busiest is very easy. Use the vmstat -p /dev/sda1 command and your hard disk information will be printed showing the number of reads and writes for each partition. On my Ubuntu system, the /dev/sda1 partition is the busiest. john@deep-thought ~ $ vmstat -p … Read more
The ed(1) line editor is a very useful editor for text files on Linux and it is very simple to use. type ed to start it then to add text to an existing text file, type e my.txt. Then a to append text onto the text file. [13:20:35-*-homer@hungry-forest Desktop]$ ed e my.txt 1449 a[13:20:35-*-homer@hungry-forest Desktop]$ … Read more
Using the VIM editor for Linux is a good way to edit configuration files and write programming code. if the VIM editor is not installed on your system then type sudo apt-get install vim. To type text once you have entered the editor, press the i key to enter editing mode. To delete a line … Read more
The best way to create a new file with Linux is to use the touch(1) command. The touch command, when used on an existing file will update the file date stamp to the current system date. But if you type touch myfile.txt this will create an empty file named myfile.txt if this file is not … Read more
I am trying out the PC-BSD 9.0 live DVD at the moment, this distribution of FreeBSD comes on a variety of ISO images, I downloaded the 2.1 gigabyte Live DVD and loaded it up on my Core i3 machine. The KDE desktop is working well, even though this distribution does not support GEM/KMS yet, so … Read more
I have had a show-stopper bug in Fedora Core 16 that is preventing the distribution from loading. I have tried everything to fix this, to no avail. I am installing a CD of Ubuntu 10.10 which I will then upgrade to 12.04 Precise Pangolin. That will work better than Fedora, hopefully installing updates on that … Read more
Linux and UNIX security compared to Windows and Apple Comparing Linux and UNIX security to Windows and Apple. The OSGUI tech show host has posted a video with 6 reasons why Linux sucks, with one of the reasons being that there are many packaging systems instead of just one. But that is the thing with … Read more
Time a UNIX command. the time(1) command will tell you how long it took for a command to execute. ubuntu ~ $ sudo time find / -name dpkg.log /var/log/dpkg.log 0.82user 1.82system 0:34.04elapsed 7%CPU (0avgtext+0avgdata 2260maxresident)k 679328inputs+0outputs (2major+4374minor)pagefaults 0swapsubuntu ~ $ sudo time find / -name dpkg.log /var/log/dpkg.log 0.82user 1.82system 0:34.04elapsed 7%CPU (0avgtext+0avgdata 2260maxresident)k 679328inputs+0outputs (2major+4374minor)pagefaults … Read more
This output below is the result of running strings(1) on my pagefile.sys file left over from running Windows 7. You can see there is a bit of activity going on behind the scenes of Windows that I was not aware of. I thought my system had no bugs in it at all, but I loaded … Read more
There are many useful Linux commands that are fun to use and can do some very cool things. cat mysongpart2.mp3 >> mysongpart1.mp3cat mysongpart2.mp3 >> mysongpart1.mp3 Using /bin/cat to append the second part of a MP3 file onto the first part, making one large file that will play seamlessly from part one to part 2. vmstat … Read more
Killing a running task UNIX style in Windows 7 is very easy indeed, the tasklist command makes this just as easy as it is in UNIX/Linux.Just type tasklist in the command prompt and it will display a list of running processes. Then look for the PID of the process you want to kill and type … Read more
Linux is not Windows. http://linux.oneandoneis2.org/LNW.htm This is a very good web page that explains the fundamental differences between Windows and Linux. There are many fundamental changes you need to make when making the switch from Windows to a Linux machine, the major changes difference is that Linux is not as susceptible to viruses as Windows … Read more
This is the UNIX operating system that the computer in TRON legacy is running, it appears to be an operating system that is created by Sun Microsystems, like Solaris. The name of this operating system which is a play on the name of the Solaris UNIX operating system. The user flynn is trying to login … Read more
http://www.omgubuntu.co.uk/2010/09/linux-top-command-used-in-tron-trailer/#dsq-new-post. In the Tron legacy film trailer at 1:12, you can see a terminal displaying the output of the top(1) command, a traditional UNIX command to display the list of running processes. It is funny that the machine is only showing 9 days of uptime though, it should be longer than that. This is like … Read more
The best thing about using Linux instead of using Windows, is that when you install a new piece of hardware on your machine or plug-in a USB device and set it up, there is no juggling CD`s and searching the Internet for updated drivers to get the hardware working, for the most part; it will … Read more