tar cvf archive.tar *.txt
will create an archive called archive.tar with all the .txt files in the current directory.
tar cvzf archive.tar.gz *.txt
will create a compressed archive called archive.tar.gz
utilities is nothing but predefined commands in linux
Compression is used to make something smaller. Archiving is used for long term storage of something that's not often used anymore.
Innumerable. Remember that any program on Linux can be launched from the command line, so there are as many commands as there are programs.
ls
There are no standardized commands for backing up a Linux system. Backup methods can range from dd to RAID to one of various backup utilities.
Yes. Just about everything to do with Linux on the command line is case sensitive, including commands and file names.
Oracle 10g's commands are internal; they have nothing to do with what platform it is running on.
There is none. For starters, you have it backwards, DOS actually copied most of its commands from Unix (The rest came from CP/M.), which Linux is inspired by. Commands like "cd" and "dir" were Unix commands long before DOS even existed.
tar is one of the basic commands in Unix. tar command in unix is used for achriving purpose, you can create archive, update or extract from archieve using tar command in unix.you can also create compressed archieve by combining bzip2 and gzip along with unix tar command
You can view the history of commands entered on a Linux system with the history command.
There are many websites where one can learn about fdisk and many other Linux commands including Linux Help, Tuxfiles, Computer Hope, Linux Questions and Linux Solved.
No. Linux is a free, open-source version of UNIX. Many of DOS's commands were based on UNIX commands, but the underlying operating system is much more powerful than DOS.