Shulou(Shulou.com)06/03 Report--

Cloud Computing Learning Route course outline Courseware: file Link

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Soft links or symbolic links

Hard link

Symbolic links symbolic link soft connections

[root@tianyun ~] # echo 111 > / file1

[root@tianyun] # ln-s / file1 / home/file11

[root@tianyun ~] # ll / home/file11

Lrwxrwxrwx 1 root root 6 Dec 20 17:58 / home/file11-> / file1

[root@tianyun] # ll-I / file1 / home/file11

4599081-rw-r--r-- 1 root root 4 Dec 20 17:57 / file1

135 lrwxrwxrwx 1 root root 6 Dec 20 17:58 / home/file11-> / file1

[root@tianyun ~] # cat / file1

one hundred and eleven

[root@tianyun ~] # cat / home/file11

one hundred and eleven

[root@tianyun ~] # rm-rf / file1

[root@tianyun ~] # ll / home/file11

Lrwxrwxrwx 1 root root 6 Dec 20 17:58 / home/file11-> / file1

II. Hard links

4 / etc/file1 4 / usr/file1-h

[root@tianyun ~] # echo 222 > / file2

[root@tianyun ~] # ln / file2 / file2-h2

[root@tianyun ~] # ln / file2 / home/file2-h3

Ln: failed to create hard link'/ home/file2-h3' = >'/ file2': Invalid cross-device link

[root@tianyun ~] # ln / file2 / etc/file2-h4

[root@tianyun ~] # echo 222 > / file2

[root@tianyun ~] # ln / file2 / file2-h2

[root@tianyun ~] # ln / file2 / home/file2-h3

Ln: failed to create hard link'/ home/file2-h3' = >'/ file2': Invalid cross-device link

[root@tianyun ~] # ln / file2 / etc/file2-h4

[root@tianyun] # ll-I / file2 / file2-h2 / etc/file2-h4

4599081-rw-r--r-- 3 root root 4 Dec 20 18:03 / etc/file2-h4

4599081-rw-r--r-- 3 root root 4 Dec 20 18:03 / file2

4599081-rw-r--r-- 3 root root 4 Dec 20 18:03 / file2-h2

Make multiple links to some important documents

Note: hard link

Cannot cross file systems (partitions)

Hard links in directories are not supported.

[root@tianyun home] # ln / home/ / mnt

Ln: "/ home/": hard links to directories are not allowed

Warning: when deleting a directory softchain:

Mkdir / home/it1000touch / home/it1000/file {1.. 10} ln-s / home/it1000/ / var/

Rm-rf / var/it1000/ delete files in the directory

Rm-rf / var/it1000 deletes only the linked file itself

[root@tianyun] # ln-s / etc / home/

[root@tianyun ~] # rm-rf / home/etc/

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