1： 如何查找大文件？
搜索当前目录下，超过100M大小的文件:
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[root@getlnx01 u03]# find . -type f -size +100M
./usr/local/jdk-7u67-linux-x64.tar.gz
./data/log/charge-service/test-access.log.
2016
-
08
-
08
.log
./data/log/aaa_service/test-access.log.
2016
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08
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09
.log
./home/deploy/logs/testmqlogs/otherdays/testmq_client.
1
.log
./home/deploy/logs/testmqlogs/otherdays/testmq_client.
2
.log
./opt/backend/charge-service/
1.2
/shared/console.log
./opt/backend/express_service/
0.0
.
3
.tar.gz
./opt/backend/aaa-service/
1.2
/shared/console.log
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更详细显示一些文件属性或信息:
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[root@getlnx01 u03]# find . -type f -size +100M -print0 | xargs -
0
ls -l
-rw-rw-r--
1
deploy deploy
542795006
8
月
30
15
:
14
./data/log/charge-service/test-access.log.
2016
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08
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08
.log
-rw-rw-r--
1
deploy deploy
225658142
8
月
25
16
:
28
./data/log/aaa_service/test-access.log.
2016
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08
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09
.log
-rw-rw-r--
1
deploy deploy
253623621
8
月
30
15
:
15
./home/deploy/logs/testmqlogs/otherdays/testmq_client.
1
.log
-rw-rw-r--
1
deploy deploy
373547598
8
月
25
16
:
28
./home/deploy/logs/testmqlogs/otherdays/testmq_client.
2
.log
-rw-rw-r--
1
deploy deploy
645631934
8
月
30
15
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15
./opt/backend/charge-service/
1.2
/shared/console.log
-rw-rw-r--
1
deploy deploy
209314900
8
月
30
15
:
15
./opt/backend/aaa-service/
1.2
/shared/console.log
-rw-r--r--
1
root root
315334884
12
月
21
2015
./opt/backend/express_service/
0.0
.
3
.tar.gz
-rw-r--r--
1
root root
142376665
6
月
11
2015
./usr/local/jdk-7u67-linux-x64.tar.gz
-rw-rw-r--
1
deploy deploy
105085974
8
月
30
15
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15
./usr/local/push-tomcat/logs/push/info.log6829699375703641.tmp
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当我们只需要查找超过100M大小文件，并显示查找出来文件的具体大小，并排序（下）
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[root@getlnx01 u03]# find . -type f -size +100M -print0 | xargs -
0
du -h
102M ./usr/local/push-tomcat/logs/push/info.log6829699375703641.tmp
136M ./usr/local/jdk-7u67-linux-x64.tar.gz
518M ./data/log/charge-service/test-access.log.
2016
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.log
216M ./data/log/aaa_service/test-access.log.
2016
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.log
242M ./home/deploy/logs/testmqlogs/otherdays/testmq_client.
1
.log
357M ./home/deploy/logs/testmqlogs/otherdays/testmq_client.
2
.log
616M ./opt/backend/charge-service/
1.2
/shared/console.log
301M ./opt/backend/express_service/
0.0
.
3
.tar.gz
201M ./opt/backend/aaa-service/
1.2
/shared/console.log
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[root@getlnx01 u03]# find . -type f -size +100M -print0 | xargs -
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du -h | sort -nr
616M ./opt/backend/charge-service/
1.2
/shared/console.log
518M ./data/log/charge-service/test-access.log.
2016
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08
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.log
357M ./home/deploy/logs/testmqlogs/otherdays/testmq_client.
2
.log
301M ./opt/backend/express_service/
0.0
.
3
.tar.gz
243M ./home/deploy/logs/testmqlogs/otherdays/testmq_client.
1
.log
216M ./data/log/aaa_service/test-access.log.
2016
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08
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.log
201M ./opt/backend/aaa-service/
1.2
/shared/console.log
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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。
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[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
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[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
.
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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
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[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
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参考资料：
http://linuxandfriends.com/how-to-find-large-files-in-linux-using-command-line/
http://www.docin.com/p-563963500.html
本文转自奔跑在路上博客51CTO博客，原文链接http://blog.51cto.com/qiangsh/1844338如需转载请自行联系原作者
qianghong000
