为什么 ls -la 不显示当前目录是符号链接？

Question

这更像是一种好奇心，但我注意到/etc/httpd/logs符号链接到/var/log/httpd，但是当我在里面时/etc/httpd/logs，ls -la我看到：

drwx------ 2 root root    4096 Mar 21 14:58 .
drwxr-xr-x 9 root root    4096 Mar 17 03:10 ..

为什么.条目不显示 lrwx....？

但是当我去/etc/httpd和做ls -la我看到：

lrwxrwxrwx 1 root root   19 Mar  4 17:12 logs -> ../../var/log/httpd

Answer 1

我可以回答一个问题吗？假设您在此处安装了 RedHat/CentOS...

ls /etc/httpd/
  # should return something like:
  # conf  conf.d  logs  modules  run
cd /etc/httpd/logs/
  # Why does this next command fail?
ls ../conf
  # ls: cannot access ../conf: No such file or directory
  # But this next command works?
cd ../conf

简短的回答是，当您在“内部” /etc/httpd/logs（符号链接）时，您实际上是在内部/var/log/httpd，这是一个目录。

cd /etc/httpd/logs/
pwd
  # /etc/httpd/logs
pwd -P
  # /var/log/httpd