LINUX redhat 14th Unit documentation

# # # #1. Device Access # # #
1. Equipment identification
/DEV/XDXN # #硬盘设备/DEV/SDA1
/dev/cdrom # #光驱
/dev/mapper/* # #虚拟设备

2. Use of the device
# # "Discovery of Equipment" # #
Fdisk-l # #查看真实存在的设备
Cat/proc/partitions # #系统能够识别的设备
Blkid # #系统能够挂载使用的设备id
DF # #查看设备被系统使用的情况

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# # "Use of equipment" # #
1. Mounting of the device
Mount Device mount point
Mount/dev/sdb1/mnt #把系统中第二块硬盘的第一个分区挂载到 the/mnt directory

2. Uninstalling the device
Umout Equipment | mount point

If the following conditions occur:
[Email protected]oundation0 ~]# UMOUNT/DEV/SDB1
Umount:/home/kiosk/desktop/photo:target is busy.
(In some cases useful info about processes
The device is found by lsof (8) or fuser (1))
Solve:
FUSER-KVM Device | mount point-K kill,-V show details,-m scan device


# # # #2. Soft and Hard Links # # #
Ls-i # #查看文件节点号
Ln-s/file/file1 # #软链接
Ln/file/file1 # #硬链接

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# # # #3. File Search # # #
1.locate filename # #在文件数据库中搜索filename信息, updatedb update file database
2.find

Find Lookup Location-condition condition value-exec action {} \;
-name
-not conditions
-user
-group
-size
-perm
--maxdepth
--mindepth
-A
-O
-type F File
Catalog D
C-Character device
B-Block Equipment
s set of section words
L Link

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DD If=/dev/zero of=/mnt/file1 bs=1024 count=10
DD If=/dev/zero of=/mnt/file2 bs=1024 count=20
DD If=/dev/zero of=/mnt/file3 bs=1024 count=30

Find/mnt-size 10k
find/mnt-size-10k
Find/mnt-size +10k

LINUX redhat 14th Unit documentation