10 knowledge points that Linux novices need to know

Linux for some beginners, feel no way, or do not know where to learn from? How to learn? To address these questions, let me tell you about the 10 knowledge points that beginners need to learn about Linux.

Note Case

Linux is a case-sensitive system, for example, Mozilla, Mozilla, Mozilla and Mozilla are four different commands (but only the fourth Mozilla is a really effective command). Also, My_file, My_file, and My_file are three different files. User logins and Secrets are also case-sensitive (this is because UNIX systems and C-language traditions are always case sensitive).

named file name

The file name can be up to 256 characters long and can contain numbers, dots ".", Underscore "_", "crossbar"-", plus some other characters that are not recommended for use.

Show hidden files

File name preceded with "." File is not normally displayed when you enter the "ls" or "dir" command. You can think of these files as hidden files, but you can also use the command "Ls–a" to display the files.

root directory

The "/" Pair equals DOS "\" (The root directory, which means the parent directory of all other directories, or a spacer symbol between the directory and between the directory and the file). As an example, Cd/usr/doc.

directory tree

Under the Linux system, all directories are displayed under a single directory tree (distinct from the drive identity of the DOS system). This means that all the files and directories on all the physical devices are merged under a single directory tree.

Notes

In the configuration file, lines that begin with # are comment lines. When modifying the configuration file, try not to delete the old settings-you can change the original settings and "#" into a comment line, always in the modified place to add some comments about the changes, you will find that in the future management benefit a lot.

Home Directory

Linux is an inherited multi-user operating system. Your personal settings (and other users ' personal settings) are placed in your home directory (typically/home/your_user_login_name). Many of the profile's file names are "." Start so that users generally do not see these files.

/ etc directory

The entire system-wide setting is generally placed in the directory/etc.

access Rights

Similar to other multi-user operating systems, under Linux, files and directories have their own owners and access rights. Generally, you are only allowed to file into your home directory (/home/your_user_login_name). Learn some knowledge about file rights Management, or you'll find Linux really troublesome.

Parameters

Command parameter options are typically guided by "-" followed by a character (or "--", when the item is more than one word). In this way, "-" is a bit like "/" under DOS. As an example, enter the command RM--help.

10 knowledge points that Linux novices need to know