面试笔记2

Java面试题 2019-02-10

1：如何查找大文件？

[root@getlnx01 u03]
/u03
[root@getlnx01 u03]
./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

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[root@getlnx01 u03]
-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

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[root@getlnx01 u03]
3G    ./flash_recovery_area/backup/backupsets/ora_df873519197_s46815_s1
1G    ./flash_recovery_area/backup/backupsets/ora_df873523646_s46822_s1
2G    ./flash_recovery_area/backup/backupsets/ora_df873521714_s46818_s1
2G    ./flash_recovery_area/backup/backupsets/ora_df873522876_s46820_s1
5G    ./flash_recovery_area/backup/backupsets/ora_df873517396_s46813_s1
1G    ./flash_recovery_area/backup/backupsets/ora_df873523321_s46821_s1
3G    ./flash_recovery_area/backup/backupsets/ora_df873515765_s46811_s1
6G    ./flash_recovery_area/backup/backupsets/ora_df873520789_s46817_s1
1004M   ./flash_recovery_area/backup/backupsets/ora_df873524162_s46823_s1
6G    ./flash_recovery_area/backup/backupsets/ora_df873518302_s46814_s1
6G    ./flash_recovery_area/backup/backupsets/ora_df873519953_s46816_s1
6G    ./flash_recovery_area/backup/backupsets/ora_df873516500_s46812_s1
6G    ./flash_recovery_area/backup/backupsets/ora_df873513413_s46809_s1
8G    ./flash_recovery_area/backup/backupsets/ora_df873514789_s46810_s1
1G    ./oradata/epps/invsubmat_d08.dbf
0G    ./oradata/epps/gmtinv_d08.dbf
1G    ./oradata/epps/gmtinv_x01.dbf
1G    ./oradata/epps/undotbs02.dbf
1G    ./oradata/epps/gmtinv_d07.dbf
1G    ./oradata/epps/undotbs01.dbf
1G    ./oradata/epps/gmtinv_x02.dbf

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[root@getlnx01 u03]
1004M   ./flash_recovery_area/backup/backupsets/ora_df873524162_s46823_s1
1G    ./oradata/epps/undotbs02.dbf
1G    ./oradata/epps/undotbs01.dbf
1G    ./oradata/epps/invsubmat_d08.dbf
1G    ./oradata/epps/gmtinv_x02.dbf
1G    ./oradata/epps/gmtinv_x01.dbf
1G    ./oradata/epps/gmtinv_d07.dbf
0G    ./oradata/epps/gmtinv_d08.dbf
6G    ./flash_recovery_area/backup/backupsets/ora_df873513413_s46809_s1
8G    ./flash_recovery_area/backup/backupsets/ora_df873514789_s46810_s1
6G    ./flash_recovery_area/backup/backupsets/ora_df873520789_s46817_s1
6G    ./flash_recovery_area/backup/backupsets/ora_df873519953_s46816_s1
6G    ./flash_recovery_area/backup/backupsets/ora_df873518302_s46814_s1
6G    ./flash_recovery_area/backup/backupsets/ora_df873516500_s46812_s1
5G    ./flash_recovery_area/backup/backupsets/ora_df873517396_s46813_s1
3G    ./flash_recovery_area/backup/backupsets/ora_df873519197_s46815_s1
3G    ./flash_recovery_area/backup/backupsets/ora_df873515765_s46811_s1
2G    ./flash_recovery_area/backup/backupsets/ora_df873522876_s46820_s1
2G    ./flash_recovery_area/backup/backupsets/ora_df873521714_s46818_s1
1G    ./flash_recovery_area/backup/backupsets/ora_df873523646_s46822_s1
1G    ./flash_recovery_area/backup/backupsets/ora_df873523321_s46821_s1

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2: 如何查找Linux下的大目录

[root@getlnx01 u03]
16K     ./lost+found
33G     ./flash_recovery_area
37G     ./oradata
70G     .

[root@getlnx01 u03]
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]
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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[root@getlnx01 /]
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 /]# 

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