Rhcsa the next day

1. Introduce the difference between soft and hard links

Symbolic links are also called soft links , And the original file is not a file . for example Windows Shortcut to ,

Characteristics of action ： Find a file in the specified path and access it quickly and easily , Delete source file shortcut cannot be accessed

Create objects ： Text files and directory files can be created , And can cross file systems

Hard links , Multiple filenames point to the same Inode

Characteristics of action ： Prevent users from deleting by mistake , Backup （ Backup only for file names ）

Create objects ： Cannot create for catalog file , And can't cross file systems

2. Create hard and soft link files as required （ stay /home Create the file as aaa, And in / Create a soft link file in the directory a.txt; /root Create a hard link file as ）

 

 

 

3. In the current system / Create under directory 100 File （ File name e.g ：abc1..abc100）

 

4. Introduce ll List what each column of information in a directory is

 

5. Create directory /test/sysroot Create three files in this directory a,b,c After then sysroot Directory move to /tmp Change the name to sys Ensure that the three files in the directory also exist

 

 

6 Delete /tmp/sys/a file .

 

7. Catalog /tmp Create 4 A catalog , And create one under each of these four directories test Catalog

8. Create a test Catalog , Create a file in this directory , Content writing nano

 

 

 

9. stay /dir Create directory under dir2 And documents file1, Moving files file1 To create test Directory , Put the table of contents dir2 Copied to the test Directory