Open your distribution's terminal emulator application, or hit Alt-F2 and type in the command. For help about a specific command, you can almost always follow the command with something like --help or -?.
For example, typing:
wget --help
would display help for wget.
utilities is nothing but predefined commands in linux
Innumerable. Remember that any program on Linux can be launched from the command line, so there are as many commands as there are programs.
Because Linux is actually more popular in most fields these days than certified Unix.
Commands you use in a Unix based computer OS to achieve certain things. Similar to MS/DOS commands in Windows. Mostly used in computers running the Linux OS. unix command
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.
You may patch your linux operating system using the terminal commands in the operating system. You must be a specialized and should know what you are doing before continuing this project.
You can view the history of commands entered on a Linux system with the history command.
lsusb (in a terminal) will list any USB device connected to the computer.