Linux Learning Notes-data lookup, data interception

Source: Internet
Author: User

######### #数据查找 ##########


Find # #find command to locate files in the system
-name # #按照文件名查找
-user # #按照文件属主查找
-group # #按文件属组查找
-perm # #按文件权限查找
-type # #按文件类型查找
# #文件类型: B-Block device C-character device D directory f plain file L link s (socket)
-size N # #查找大小符合n条件的文件
-amin N # #查找系统最后n分钟访问的文件
-atime N # #查找作后n * 24-hour access to files
-cmin N # #查找最后n分钟被改变文件状态的文件
-mmin N # #查找最后n分钟被改变文件数据的文件
Condition 1-o Condition 2 # #查找满足条件1或者条件2
Condition 1-a Condition 2 # #查找满足条件1和条件2
-exec command {} \; # # #对查找出的结果做相应处理


Find path Condition Condition value
eg
Find/mnt-name File # #列出/mnt file named files
Find/mnt-name "file*" # #列出/mnt filename contains file
Find/etc-name "*.conf" # #列出 files with the/mnt file name ending in. conf
find/opt/software/file/-perm 777 # #列出/opt/software/file/file with permission 777
Find./-mmin +1 # #列出当前目录一分钟之前被修改的文件
Find-atime 2 # #查找作后48 =2*24 hours access to files
Find. -type D|sort # #查找当前所有目录并排序
Find/-group mail-exec cp-pr {}/mnt/\; # #在根下找出mail组的文件并复制到 under the/mnt


2.locate # #该命令其实是find an abbreviation for-name, but faster than it, because locate searches for local files contained in the database
# #一般在使用之前要updatedb
Locate + conditions # #在数据库中查找符合条件的文件
UpdateDB # #手动更新数据库

3.whereis # #该命令只用于程序名的搜索, the associated path to the binary program, source code files, and man manuals used to locate instructions
-B # #只查找二进制文件
-B # #只在此目录下查找二进制文件
-M # #只查找说明文件
-S # #只查找原始代码文件

4.which # #该命令用于查找给定命令的绝对路径
eg
which PWD # #查找pwd命令的绝对路径
/bin/pwd


######### #数据截取 ##########
DD If=/dev/zero of=/mnt/file bs=1024 count=10
DD # #数据截取
If # #数据模板
of # #数据存放文件
BS # #数据模板块大小 (per block)
Count # #数据快个数

This article is from the "12148275" blog, please be sure to keep this source http://12158275.blog.51cto.com/12148275/1899932

Linux Learning Notes-data lookup, data interception

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