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1 楼 
 文章标题 : ls -l 结果的具体解释?
帖子发表于 : 2009-06-03 18:14 

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man ls
以及google都找不到
ls -l的 结果各个项的具体含义是什么?
我了解个大概
但是有的不清楚


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2 楼 
 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-03 22:31 

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随便找一本linux书上忙都有


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3 楼 
 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-03 22:42 
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代码:
ls --help

看看 :em02


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 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-03 22:44 
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man ls


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5 楼 
 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-03 22:45 
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直接在终端里试下ls和ls -l比较下就知道了。


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6 楼 
 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-04 1:29 

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man ls
ls --help都没有解释 ls -l
后各个项的含义
代码:
-rw-r--r-- 2 nanger nanger 10 2009-06-03 19:27 a



比如上面
第一个rw- 是自己
第二个是同组
第三个是others
那么 那个 2 10是什么
等等
两个nanger 的区别?
2009-06-03 19:27 是访问时间 创建时间 还是修改时间?


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7 楼 
 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-04 9:01 

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再说一遍
man ls


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8 楼 
 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-04 13:08 
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我试了下如:
代码:
-rw-r--r--  1 root ssvi      5246 2009-04-10 16:11 vsftpd.conf
drwxr-xr-x  3 ssvi ssvi       424 2009-05-28 16:30 图片

一: 1/2/3…应该是文件夹的深度 :em06
运行
代码:
ls -lah

代码:
-rw-r--r--  1 root ssvi 5.2K 2009-04-10 16:11 vsftpd.conf
drwxr-xr-x  3 ssvi ssvi  424 2009-05-28 16:30 图片

第一个XXX是所属用用户,第二个XXX是所属群组
时间是最后修改时间,应该是这样……


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9 楼 
 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-04 20:12 
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:em20


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10 楼 
 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-05 8:26 
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:em20


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11 楼 
 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-08 22:32 

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ls -l 命令,查看详细信息格式的文件列表,您将会看到如下内容:

total 5
drwxr-x--- 4 user group 4096 Mar 10 00:37 filename
drwxr-xr-x 21 user group 4096 Mar 10 20:16 文件名
-rw------- 1 user group 524 Mar 10 00:40 a
-rw-r--r-- 1 user group 24 Jun 11 2000 b
drwx------ 2 user group 4096 Mar 9 11:06 c

共显示了七列信息,从左至右依次为:权限、文件数、归属用户、归属群组、文件大小、创建日期、文件名称

其中要特别留意的是第一列:

drwxr-xr-x

一共有10个位置,可以分为4组:

d rwx r-x r-x

第一组只有一个字符:

* d 文件夹
* - 普通文件
* l 链接
* b 块设备文件
* c 字符设备文件。

剩下的3组分别为归属用户、归属群组、其它用户或群组对于该文件的权限。我们看它的格式

rwx rwx rwx

* r 可读
* w 可写
* x 可执行

它们的顺便不能颠倒,某一位置为空(-),则表示不具有相应的权限。


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12 楼 
 文章标题 : Re: ls -l 结果的具体解释?
帖子发表于 : 2009-06-09 12:59 

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看了一下,ubuntu 的 man ls 确实不够详细。贴一个 BSD 的:
你的答案在 The Long Format 一节。
代码:
LS(1)                     BSD General Commands Manual                    LS(1)

NAME
     ls -- list directory contents

SYNOPSIS
     ls [-ABCFGHLPRSTW@abcdefghiklmnopqrstuwx1] [file ...]

DESCRIPTION
     For each operand that names a file of a type other than directory, ls
     displays its name as well as any requested, associated information.  For
     each operand that names a file of type directory, ls displays the names
     of files contained within that directory, as well as any requested, asso-
     ciated information.

     If no operands are given, the contents of the current directory are dis-
     played.  If more than one operand is given, non-directory operands are
     displayed first; directory and non-directory operands are sorted sepa-
     rately and in lexicographical order.

     The following options are available:

     -@      Display extended attribute keys and sizes.

     -1      (The numeric digit ``one''.)  Force output to be one entry per
             line.  This is the default when output is not to a terminal.

     -A      List all entries except for . and ...  Always set for the super-
             user.

     -a      Include directory entries whose names begin with a dot (.).

     -B      Force printing of non-printable characters (as defined by
             ctype(3) and current locale settings) in file names as \xxx,
             where xxx is the numeric value of the character in octal.

     -b      As -B, but use C escape codes whenever possible.

     -C      Force multi-column output; this is the default when output is to
             a terminal.

     -c      Use time when file status was last changed for sorting or print-
             ing.

     -d      Directories are listed as plain files (not searched recursively).

     -e      Print the Access Control List (ACL) associated with the file, if
             present.

     -F      Display a slash (`/') immediately after each pathname that is a
             directory, an asterisk (`*') after each that is executable, an at
             sign (`@') after each symbolic link, an equals sign (`=') after
             each socket, a percent sign (`%') after each whiteout, and a ver-
             tical bar (`|') after each that is a FIFO.

     -f      Output is not sorted.  This option turns on the -a option.

     -G      Enable colorized output.  This option is equivalent to defining
             CLICOLOR in the environment.  (See below.)

     -g      This option is only available for compatibility with POSIX; it is
             used to display the group name in the long (-l) format output
             (the owner name is suppressed).

     -H      Symbolic links on the command line are followed.  This option is
             assumed if none of the -F, -d, or -l options are specified.

     -h      When used with the -l option, use unit suffixes: Byte, Kilobyte,
             Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the
             number of digits to three or less using base 2 for sizes.

     -i      For each file, print the file's file serial number (inode num-
             ber).

     -k      If the -s option is specified, print the file size allocation in
             kilobytes, not blocks.  This option overrides the environment
             variable BLOCKSIZE.

     -L      If argument is a symbolic link, list the file or directory the
             link references rather than the link itself.  This option cancels
             the -P option.

     -l      (The lowercase letter ``ell''.)  List in long format.  (See
             below.)  If the output is to a terminal, a total sum for all the
             file sizes is output on a line before the long listing.

     -m      Stream output format; list files across the page, separated by
             commas.

     -n      Display user and group IDs numerically, rather than converting to
             a user or group name in a long (-l) output.  This option turns on
             the -l option.

     -O      Include the file flags in a long (-l) output.

     -o      List in long format, but omit the group id.

     -P      If argument is a symbolic link, list the link itself rather than
             the object the link references.  This option cancels the -H and
             -L options.

     -p      Write a slash (`/') after each filename if that file is a direc-
             tory.

     -q      Force printing of non-graphic characters in file names as the
             character `?'; this is the default when output is to a terminal.

     -R      Recursively list subdirectories encountered.

     -r      Reverse the order of the sort to get reverse lexicographical
             order or the oldest entries first (or largest files last, if com-
             bined with sort by size

     -S      Sort files by size

     -s      Display the number of file system blocks actually used by each
             file, in units of 512 bytes, where partial units are rounded up
             to the next integer value.  If the output is to a terminal, a
             total sum for all the file sizes is output on a line before the
             listing.  The environment variable BLOCKSIZE overrides the unit
             size of 512 bytes.

     -T      When used with the -l (lowercase letter ``ell'') option, display
             complete time information for the file, including month, day,
             hour, minute, second, and year.

     -t      Sort by time modified (most recently modified first) before sort-
             ing the operands by lexicographical order.

     -u      Use time of last access, instead of last modification of the file
             for sorting (-t) or printing (-l).

     -v      Force unedited printing of non-graphic characters; this is the
             default when output is not to a terminal.

     -W      Display whiteouts when scanning directories.  (-S) flag).

     -w      Force raw printing of non-printable characters.  This is the
             default when output is not to a terminal.

     -x      The same as -C, except that the multi-column output is produced
             with entries sorted across, rather than down, the columns.

     The -1, -C, -x, and -l options all override each other; the last one
     specified determines the format used.

     The -c and -u options override each other; the last one specified deter-
     mines the file time used.

     The -B, -b, -w, and -q options all override each other; the last one
     specified determines the format used for non-printable characters.

     The -H, -L and -P options all override each other (either partially or
     fully); they are applied in the order specified.

     By default, ls lists one entry per line to standard output; the excep-
     tions are to terminals or when the -C or -x options are specified.

     File information is displayed with one or more <blank>s separating the
     information associated with the -i, -s, and -l options.

   The Long Format
     If the -l option is given, the following information is displayed for
     each file: file mode, number of links, owner name, group name, number of
     bytes in the file, abbreviated month, day-of-month file was last modi-
     fied, hour file last modified, minute file last modified, and the path-
     name.  In addition, for each directory whose contents are displayed, the
     total number of 512-byte blocks used by the files in the directory is
     displayed on a line by itself, immediately before the information for the
     files in the directory.  If the file or directory has extended
     attributes, the permissions field printed by the -l option is followed by
     a '@' character.  Otherwise, if the file or directory has extended secu-
     rity information, the permissions field printed by the -l option is fol-
     lowed by a '+' character.

     If the modification time of the file is more than 6 months in the past or
     future, then the year of the last modification is displayed in place of
     the hour and minute fields.

     If the owner or group names are not a known user or group name, or the -n
     option is given, the numeric ID's are displayed.

     If the file is a character special or block special file, the major and
     minor device numbers for the file are displayed in the size field.  If
     the file is a symbolic link, the pathname of the linked-to file is pre-
     ceded by ``->''.

     The file mode printed under the -l option consists of the entry type,
     owner permissions, and group permissions.  The entry type character
     describes the type of file, as follows:

           b     Block special file.
           c     Character special file.
           d     Directory.
           l     Symbolic link.
           s     Socket link.
           p     FIFO.
           -     Regular file.

     The next three fields are three characters each: owner permissions, group
     permissions, and other permissions.  Each field has three character posi-
     tions:

           1.   If r, the file is readable; if -, it is not readable.

           2.   If w, the file is writable; if -, it is not writable.

           3.   The first of the following that applies:

                      S     If in the owner permissions, the file is not exe-
                            cutable and set-user-ID mode is set.  If in the
                            group permissions, the file is not executable and
                            set-group-ID mode is set.

                      s     If in the owner permissions, the file is exe-
                            cutable and set-user-ID mode is set.  If in the
                            group permissions, the file is executable and set-
                            group-ID mode is set.

                      x     The file is executable or the directory is search-
                            able.

                      -     The file is neither readable, writable, exe-
                            cutable, nor set-user-ID nor set-group-ID mode,
                            nor sticky.  (See below.)

                These next two apply only to the third character in the last
                group (other permissions).

                      T     The sticky bit is set (mode 1000), but not execute
                            or search permission.  (See chmod(1) or
                            sticky(8).)

                      t     The sticky bit is set (mode 1000), and is search-
                            able or executable.  (See chmod(1) or sticky(8).)

EXAMPLES
     The following is how to do an ls listing sorted by increasing size

           ls -lrS

DIAGNOSTICS
     The ls utility exits 0 on success, and >0 if an error occurs.

ENVIRONMENT
     The following environment variables affect the execution of ls:

     BLOCKSIZE       If the environment variable BLOCKSIZE is set, the block
                     counts (see -s) will be displayed in units of that size
                     block.

     CLICOLOR        Use ANSI color sequences to distinguish file types.  See
                     LSCOLORS below.  In addition to the file types mentioned
                     in the -F option some extra attributes (setuid bit set,
                     etc.) are also displayed.  The colorization is dependent
                     on a terminal type with the proper termcap(5) capabili-
                     ties.  The default ``cons25'' console has the proper
                     capabilities, but to display the colors in an xterm(1),
                     for example, the TERM variable must be set to
                     ``xterm-color''.  Other terminal types may require simi-
                     lar adjustments.  Colorization is silently disabled if
                     the output isn't directed to a terminal unless the
                     CLICOLOR_FORCE variable is defined.

     CLICOLOR_FORCE  Color sequences are normally disabled if the output isn't
                     directed to a terminal.  This can be overridden by set-
                     ting this flag.  The TERM variable still needs to refer-
                     ence a color capable terminal however otherwise it is not
                     possible to determine which color sequences to use.

     COLUMNS         If this variable contains a string representing a decimal
                     integer, it is used as the column position width for dis-
                     playing multiple-text-column output.  The ls utility cal-
                     culates how many pathname text columns to display based
                     on the width provided.  (See -C and -x.)

     LANG            The locale to use when determining the order of day and
                     month in the long -l format output.  See environ(7) for
                     more information.

     LSCOLORS        The value of this variable describes what color to use
                     for which attribute when colors are enabled with
                     CLICOLOR.  This string is a concatenation of pairs of the
                     format fb, where f is the foreground color and b is the
                     background color.

                     The color designators are as follows:

                           a     black
                           b     red
                           c     green
                           d     brown
                           e     blue
                           f     magenta
                           g     cyan
                           h     light grey
                           A     bold black, usually shows up as dark grey
                           B     bold red
                           C     bold green
                           D     bold brown, usually shows up as yellow
                           E     bold blue
                           F     bold magenta
                           G     bold cyan
                           H     bold light grey; looks like bright white
                           x     default foreground or background

                     Note that the above are standard ANSI colors.  The actual
                     display may differ depending on the color capabilities of
                     the terminal in use.

                     The order of the attributes are as follows:

                           1.   directory
                           2.   symbolic link
                           3.   socket
                           4.   pipe
                           5.   executable
                           6.   block special
                           7.   character special
                           8.   executable with setuid bit set
                           9.   executable with setgid bit set
                           10.  directory writable to others, with sticky bit
                           11.  directory writable to others, without sticky
                                bit

                     The default is "exfxcxdxbxegedabagacad", i.e. blue fore-
                     ground and default background for regular directories,
                     black foreground and red background for setuid executa-
                     bles, etc.

     LS_COLWIDTHS    If this variable is set, it is considered to be a colon-
                     delimited list of minimum column widths.  Unreasonable
                     and insufficient widths are ignored (thus zero signifies
                     a dynamically sized column).  Not all columns have
                     changeable widths.  The fields are, in order: inode,
                     block count, number of links, user name, group name,
                     flags, file size, file name.

     TERM            The CLICOLOR functionality depends on a terminal type
                     with color capabilities.

     TZ              The timezone to use when displaying dates.  See
                     environ(7) for more information.

COMPATIBILITY
     The group field is now automatically included in the long listing for
     files in order to be compatible with the IEEE Std 1003.2 (``POSIX.2'')
     specification.

LEGACY DESCRIPTION
     In legacy mode, the -f option does not turn on the -a option and the -g,
     -n, and -o options do not turn on the -l option.

     Also, the -o option causes the file flags to be included in a long (-l)
     output; there is no -O option.

     When -H is specified (and not overridden by -L or -P) and a file argument
     is a symlink that resolves to a non-directory file, the output will
     reflect the nature of the link, rather than that of the file.  In legacy
     operation, the output will describe the file.

SEE ALSO
     chflags(1), chmod(1), sort(1), xterm(1), compat(5), termcap(5),
     symlink(7), sticky(8)

STANDARDS
     The ls utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY
     An ls command appeared in Version 1 AT&T UNIX.

BUGS
     To maintain backward compatibility, the relationships between the many
     options are quite complex.

BSD                              May 19, 2002                              BSD


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