几个Linux 文件夹命令

曾经终败给现在 2021-09-10 14:42 397阅读 0赞

**df :df 使用df命令查看linux磁盘剩余空间**

\[root\]\# df -hl  
文件系统                        容量        已用       可用       已用% 挂载点  
/dev/hda5                    487M     120M       342M   27%    /  
/dev/hda1                    981M      21M        911M    3%  
/boot none                   125M      0            125M    0%  
/dev/shm /dev/hda2     29G        4.9G       23G     18%  
/home /dev/hda3          20G        4.8G       14G     27%    /usr  
/dev/hda7                     24G        510M       22G    3%      /var  
/dev/hdb2                    75G         75G          0       100%   /  
  
df是以磁盘分区为单位来查看文件系统。  
/dev/hdb2 75G 75G 0 100% /, 以此为例。  
表示HD硬盘接口的第二个硬盘(b)，第二个分区(2），容量是75G，用了75G，可用是0，因此利用率是100%, 被挂载到根分区目录上（/）       
另外简单的一个办法就是鼠标右键查看磁盘、文件夹属性，就能了解到已用多少，剩余多少空间。在我自己的开发板上使用的结果

**du - estimate file space usage**

SYNOPSIS  
       du \[OPTION\]... \[FILE\]...  
  
DESCRIPTION  
       Summarize disk usage of each FILE, recursively for directories.  
  
       Mandatory arguments to long options are mandatory for short options too.  
  
       -a, --all  
              write counts for all files, not just directories  
  
       --apparent-size  
              print  apparent  sizes,  rather  than  disk  usage; although the apparent size is usually smaller, it may be  
              larger due to holes in (âsparseâ) files, internal fragmentation, indirect blocks, and the like  
  
       -B, --block-size=SIZE use SIZE-byte blocks  
  
       -b, --bytes  
              equivalent to â--apparent-size --block-size=1â

-H     like --si, but also evokes a warning; will soon change to be equivalent to --dereference-args (-D)  
  
       -h, --human-readable  
              print sizes in human readable format (e.g., 1K 234M 2G)  
  
       --si   like -h, but use powers of 1000 not 1024  
  
       -k     like --block-size=1K  
  
       -l, --count-links  
              count sizes many times if hard linked  
  
       -L, --dereference  
              dereference all symbolic links  
  
       -P, --no-dereference  
              donât follow any symbolic links (this is the default)  
  
       -0, --null  
              end each output line with 0 byte rather than newline  
  
       -S, --separate-dirs  
              do not include size of subdirectories  
  
       -s, --summarize  
              display only a total for each argument  
  
       -x, --one-file-system  
              skip directories on different filesystems  
  
       -X FILE, --exclude-from=FILE  
              Exclude files that match any pattern in FILE.

**判断一个文件夹多大：**

**du -sh foldername**