CentOS下如何查找大文件

在Windows系统中，我们可以使用TreeSize工具查找一些大文件或文件夹，非常的方便高效，在Linux系统中，如何去搜索一些比较大的文件呢？下面我整理了一下在Linux系统中如何查找大文件或文件夹的方法。

1： 如何查找大文件？

其实很多时候，你需要了解当前系统下有哪些大文件，比如文件大小超过100M或1G（阀值视具体情况而定）。那么如何把这些大文件搜索出来呢？例如我要搜索当前目录下，超过800M大小的文件

[root@getlnx01 u03]# pwd

/u03

[root@getlnx01 u03]# find . -type f -size +800M

./flash_recovery_area/backup/backupsets/ora_df873519197_s46815_s1

./flash_recovery_area/backup/backupsets/ora_df873523646_s46822_s1

./flash_recovery_area/backup/backupsets/ora_df873521714_s46818_s1

./flash_recovery_area/backup/backupsets/ora_df873522876_s46820_s1

./flash_recovery_area/backup/backupsets/ora_df873517396_s46813_s1

./flash_recovery_area/backup/backupsets/ora_df873523321_s46821_s1

./flash_recovery_area/backup/backupsets/ora_df873515765_s46811_s1

./flash_recovery_area/backup/backupsets/ora_df873520789_s46817_s1

./flash_recovery_area/backup/backupsets/ora_df873524162_s46823_s1

./flash_recovery_area/backup/backupsets/ora_df873518302_s46814_s1

./flash_recovery_area/backup/backupsets/ora_df873519953_s46816_s1

./flash_recovery_area/backup/backupsets/ora_df873516500_s46812_s1

./flash_recovery_area/backup/backupsets/ora_df873513413_s46809_s1

./flash_recovery_area/backup/backupsets/ora_df873514789_s46810_s1

./oradata/epps/invsubmat_d08.dbf

./oradata/epps/gmtinv_d08.dbf

./oradata/epps/gmtinv_x01.dbf

./oradata/epps/undotbs02.dbf

./oradata/epps/gmtinv_d07.dbf

./oradata/epps/undotbs01.dbf

./oradata/epps/gmtinv_x02.dbf

如上命令所示，我们仅仅能看到超过800M大小的文件的文件名称，但是对文件的信息（例如，文件大小、文件属性）一无所知，那么能否更详细显示一些文件属性或信息呢，当然可以，如下所示

[root@getlnx01 u03]# find . -type f -size +800M  -print0 | xargs -0 ls -l

-rw-r----- 1 oracle oinstall 2782846976 Mar  6 11:51 ./flash_recovery_area/backup/backupsets/ora_df873513413_s46809_s1

-rw-r----- 1 oracle oinstall 1878433792 Mar  6 11:53 ./flash_recovery_area/backup/backupsets/ora_df873514789_s46810_s1

-rw-r----- 1 oracle oinstall 1378492416 Mar  6 11:54 ./flash_recovery_area/backup/backupsets/ora_df873515765_s46811_s1

-rw-r----- 1 oracle oinstall 1641381888 Mar  6 11:56 ./flash_recovery_area/backup/backupsets/ora_df873516500_s46812_s1

-rw-r----- 1 oracle oinstall 1564065792 Mar  6 11:58 ./flash_recovery_area/backup/backupsets/ora_df873517396_s46813_s1

-rw-r----- 1 oracle oinstall 1663492096 Mar  6 12:00 ./flash_recovery_area/backup/backupsets/ora_df873518302_s46814_s1

-rw-r----- 1 oracle oinstall 1368244224 Mar  6 12:02 ./flash_recovery_area/backup/backupsets/ora_df873519197_s46815_s1

-rw-r----- 1 oracle oinstall 1629069312 Mar  6 12:04 ./flash_recovery_area/backup/backupsets/ora_df873519953_s46816_s1

-rw-r----- 1 oracle oinstall 1629954048 Mar  6 12:06 ./flash_recovery_area/backup/backupsets/ora_df873520789_s46817_s1

-rw-r----- 1 oracle oinstall 1202192384 Mar  6 12:07 ./flash_recovery_area/backup/backupsets/ora_df873521714_s46818_s1

-rw-r----- 1 oracle oinstall 1189388288 Mar  6 12:10 ./flash_recovery_area/backup/backupsets/ora_df873522876_s46820_s1

-rw-r----- 1 oracle oinstall 1089257472 Mar  6 12:11 ./flash_recovery_area/backup/backupsets/ora_df873523321_s46821_s1

-rw-r----- 1 oracle oinstall 1097687040 Mar  6 12:12 ./flash_recovery_area/backup/backupsets/ora_df873523646_s46822_s1

-rw-r----- 1 oracle oinstall 1051009024 Mar  6 12:13 ./flash_recovery_area/backup/backupsets/ora_df873524162_s46823_s1

-rw-r----- 1 oracle oinstall 4294975488 Apr  3 15:07 ./oradata/epps/gmtinv_d07.dbf

-rw-r----- 1 oracle oinstall 4194312192 Apr  1 22:36 ./oradata/epps/gmtinv_d08.dbf

-rw-r----- 1 oracle oinstall 4294975488 Apr  3 15:54 ./oradata/epps/gmtinv_x01.dbf

-rw-r----- 1 oracle oinstall 4294975488 Apr  3 15:57 ./oradata/epps/gmtinv_x02.dbf

-rw-r----- 1 oracle oinstall 4294975488 Apr  1 22:35 ./oradata/epps/invsubmat_d08.dbf

-rw-r----- 1 oracle oinstall 8589942784 Apr  4 09:55 ./oradata/epps/undotbs01.dbf

-rw-r----- 1 oracle oinstall 8589942784 Apr  4 09:15 ./oradata/epps/undotbs02.dbf

当我们只需要查找超过800M大小文件，并显示查找出来文件的具体大小，可以使用下面命令

[root@getlnx01 u03]# find . -type f -size +800M  -print0 | xargs -0 du -h

1.3G    ./flash_recovery_area/backup/backupsets/ora_df873519197_s46815_s1

1.1G    ./flash_recovery_area/backup/backupsets/ora_df873523646_s46822_s1

1.2G    ./flash_recovery_area/backup/backupsets/ora_df873521714_s46818_s1

1.2G    ./flash_recovery_area/backup/backupsets/ora_df873522876_s46820_s1

1.5G    ./flash_recovery_area/backup/backupsets/ora_df873517396_s46813_s1

1.1G    ./flash_recovery_area/backup/backupsets/ora_df873523321_s46821_s1

1.3G    ./flash_recovery_area/backup/backupsets/ora_df873515765_s46811_s1

1.6G    ./flash_recovery_area/backup/backupsets/ora_df873520789_s46817_s1

1004M   ./flash_recovery_area/backup/backupsets/ora_df873524162_s46823_s1

1.6G    ./flash_recovery_area/backup/backupsets/ora_df873518302_s46814_s1

1.6G    ./flash_recovery_area/backup/backupsets/ora_df873519953_s46816_s1

1.6G    ./flash_recovery_area/backup/backupsets/ora_df873516500_s46812_s1

2.6G    ./flash_recovery_area/backup/backupsets/ora_df873513413_s46809_s1

1.8G    ./flash_recovery_area/backup/backupsets/ora_df873514789_s46810_s1

4.1G    ./oradata/epps/invsubmat_d08.dbf

4.0G    ./oradata/epps/gmtinv_d08.dbf

4.1G    ./oradata/epps/gmtinv_x01.dbf

8.1G    ./oradata/epps/undotbs02.dbf

4.1G    ./oradata/epps/gmtinv_d07.dbf

8.1G    ./oradata/epps/undotbs01.dbf

4.1G    ./oradata/epps/gmtinv_x02.dbf

如果你还需要对查找结果按照文件大小做一个排序，那么可以使用下面命令

[root@getlnx01 u03]# find . -type f -size +800M  -print0 | xargs -0 du -h | sort -nr

1004M   ./flash_recovery_area/backup/backupsets/ora_df873524162_s46823_s1

8.1G    ./oradata/epps/undotbs02.dbf

8.1G    ./oradata/epps/undotbs01.dbf

4.1G    ./oradata/epps/invsubmat_d08.dbf

4.1G    ./oradata/epps/gmtinv_x02.dbf

4.1G    ./oradata/epps/gmtinv_x01.dbf

4.1G    ./oradata/epps/gmtinv_d07.dbf

4.0G    ./oradata/epps/gmtinv_d08.dbf

2.6G    ./flash_recovery_area/backup/backupsets/ora_df873513413_s46809_s1

1.8G    ./flash_recovery_area/backup/backupsets/ora_df873514789_s46810_s1

1.6G    ./flash_recovery_area/backup/backupsets/ora_df873520789_s46817_s1

1.6G    ./flash_recovery_area/backup/backupsets/ora_df873519953_s46816_s1

1.6G    ./flash_recovery_area/backup/backupsets/ora_df873518302_s46814_s1

1.6G    ./flash_recovery_area/backup/backupsets/ora_df873516500_s46812_s1

1.5G    ./flash_recovery_area/backup/backupsets/ora_df873517396_s46813_s1

1.3G    ./flash_recovery_area/backup/backupsets/ora_df873519197_s46815_s1

1.3G    ./flash_recovery_area/backup/backupsets/ora_df873515765_s46811_s1

1.2G    ./flash_recovery_area/backup/backupsets/ora_df873522876_s46820_s1

1.2G    ./flash_recovery_area/backup/backupsets/ora_df873521714_s46818_s1

1.1G    ./flash_recovery_area/backup/backupsets/ora_df873523646_s46822_s1

1.1G    ./flash_recovery_area/backup/backupsets/ora_df873523321_s46821_s1

不过如上截图所示，有时候排列的顺序并不完全是按大小一致，这个是因为du命令的参数h所致，你可以统一使用使用MB来显示，这样就能解决这个问题。到这里，这个在Linux系统查找大文件的命令已经非常完美了，当然如果你还有很多的需求，那么可以在这个命令上做修改、调整.

2: 如何查找Linux下的大目录

譬如有时候磁盘空间告警了，而你平时又疏于管理、监控文件的增长，那么我需要快速的了解哪些目录变得比较大，那么此时我们可以借助du命令来帮我们解决这个问题。

[root@getlnx01 u03]# du -h --max-depth=1

16K     ./lost+found

33G     ./flash_recovery_area

37G     ./oradata

70G     .

如果你想知道flash_recovery_area目录下面有哪些大文件夹，那么可以将参数max-depth=2 ，如果你想对搜索出来的结果进行排序，那么可以借助于sort命令。如下所示

[root@getlnx01 u03]# du -h --max-depth=2 | sort -n

3.5G    ./flash_recovery_area/EPPS

16K     ./lost+found

29G     ./flash_recovery_area/backup

33G     ./flash_recovery_area

37G     ./oradata

37G     ./oradata/epps

70G     .

[root@getlnx01 u03]# du -hm --max-depth=2 | sort -n

1       ./lost+found

3527    ./flash_recovery_area/EPPS

29544   ./flash_recovery_area/backup

33070   ./flash_recovery_area

37705   ./oradata

37705   ./oradata/epps

70775   .

[root@getlnx01 u03]# cd /

[root@getlnx01 /]# du -hm --max-depth=2 | sort -n

有时候搜索出来的结果太多了（譬如，我从根目录开始搜索），一直在刷屏，如果我只想查出最大的12个文件夹，怎么办呢？此时就要借助head命令来显示了

[root@getlnx01 /]# du -hm --max-depth=2 | sort -nr | head -12

407480  .

167880  ./u04

158685  ./u02/oradata

158685  ./u02

152118  ./u04/oradata

70775   ./u03

37705   ./u03/oradata

33070   ./u03/flash_recovery_area

5995    ./u01/app

5995    ./u01

3551    ./usr

1558    ./usr/share

[root@getlnx01 /]# 

参考资料：

http://linuxandfriends.com/how-to-find-large-files-in-linux-using-command-line/

http://www.docin.com/p-563963500.html