輸出“ls -l”命令中有多少種可能的文件類型？

通常，輸出ls -l命令中可能的文件類型是d和-，分別代表目錄和正常文件。

除此之外，我l在 macOS 的輸出中看到了另一種類型。

drwxr-xr-x   8 yongjia  staff    256 Aug 31 06:58 .
drwxr-xr-x   4 yongjia  staff    128 Aug 30 11:31 ..
lrwxr-xr-x   1 root     wheel      1 Aug 17 07:25 Macintosh HD -> /

那麼，輸出ls -l命令中有多少種可能的文件類型？

報告的文件類型ls取決於底層文件系統、作業系統的功能以及ls.

該l類型是常見的符號連結文件類型。

這（應該）記錄在您的ls手冊中。

在 OpenBSD 上（macOS 和 AIX 具有相同的列表，但順序不同）：

-     regular file
b     block special file
c     character special file
d     directory
l     symbolic link
p     FIFO
s     socket link

在 NetBSD 上（FreeBSD 也一樣，沒有aand A）：

-     Regular file.
a     Archive state 1.
A     Archive state 2.
b     Block special file.
c     Character special file.
d     Directory.
l     Symbolic link.
p     FIFO.
s     Socket link.
w     Whiteout.

來自info ls（即 GNUls手冊）：

‘-’
    regular file
‘b’
    block special file
‘c’
    character special file
‘C’
    high performance (“contiguous data”) file
‘d’
    directory
‘D’
    door (Solaris 2.5 and up)
‘l’
    symbolic link
‘M’
    off-line (“migrated”) file (Cray DMF)
‘n’
    network special file (HP-UX)
‘p’
    FIFO (named pipe)
‘P’
    port (Solaris 10 and up)
‘s’
    socket
‘?’
    some other file type

在 Solaris 11 上：

d
The entry is a directory.

D
The entry is a door.

l
The entry is a symbolic link.

b
The entry is a block special file.

c
The entry is a character special file.

p
The entry is a FIFO (or “named pipe”) special file.

P
The entry is an event port.

s
The entry is an AF_UNIX address family socket.

-
The entry is an ordinary file.

引用自：https://unix.stackexchange.com/questions/538419