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virtualized into a block device with a cache/dev/mapper/cachedevWell, the crap is over, and we're starting to actually do it.1. Environment preparation and installation of required packages# cat/etc/6.4 (Final) Kernel \ r on an \mYum--IVH http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm Yum-y install dkms gcc make yum-utils kernel kernel-devel git make gcc-c++ device-mapperYum-y Install unifdef.x86_64At the same time, Flashcache needs the entire source tree to see[Emai

. Binary command or program requires executable permission X.5. suid modifies the permission to execute the command, not the permission of the target file to be processed.6. suid permissions are only valid during program execution.7. Any system user who executes the command can obtain all the permissions of the corresponding owner during the execution of the command program.8, Suid is a double-edged sword, is a more dangerous function, the system security has a certain threat. The SUID function

Master3733 Worker2558 DataNode2748 Secondarynamenode3814 Jps2884 ResourceManager2986 NodeManager2467 NameNode[Email protected] sbin]$ Hadoop fs-ls/Found ItemsDrwxr-xr-x-hadoop supergroup 0 2017-10-02 06:29/aaaDrwxr-xr-x-hadoop supergroup 0 2017-10-06 04:04/externalDrwxr-xr-x-hadoop supergroup 0 2017-10-04 09:14/flowsum-rw-r--r--1 Hadoop supergroup 2017-10-02 02:

, run the following command:$ LinsnifferAfter the startup, linsniffer will create an empty file: tcp. log to store the sniffing result.In the test, I created a user named hapless with the password "unaware. Then, use this user to log on to the Linux server and perform some common user operations. The following is an ftp process:GPS $ ftp 192.168.0.2Connected to 192.168.0.2.220 linux.test.net FTP server Wed Aug 19 02:55:52 MST 1998) ready.Name (192.168.0.2: root): hapless331 Password required for

LINUX file security and permissions when you create a file, the system saves all information about the file, including :? File location .? File type .? File Length .? Which user owns the file and which user can access the file .? I node .? File modification time... Info nbs LINUX file security and permissions when you create a file, the system saves all information about the file, including :? File location .? File type .? File Length .? Which user owns the file and which user can access the fi

password "fad ". Then, you can log on to the Linux server using this user on the host csung and perform some common user operations. The following is an ftp process:CJH $ ftp www.red.netConnected to www.red.net.220 www.red.net FTP server Wed Aug 19 02:55:52 MST 2002) ready.Name (www.red.net: root): goodc.pdf331 Password required for goodcloud.Password:230 User goodcw.logged in.Remote system type is UNIX.Using binary mode to transfer files.Ftp> ls-al200 PORT command successful.150 Opening ASCII

temporary file. Files that have not been accessed, changed, or unmodified within 10 days are automatically removed from the directory.Another temp directory/var/tmp, files in this directory are automatically deleted if they have not been accessed, changed, or modified within 30 days /boot Files required to start the process /dev Contains special device files for the system to access the hardware In RHEL7, the following directories have the same

.=====================================================================================================attached: Android file System (ROOTFS)(reproduced below)Structure of the Android file system root directoryStructure of the Android file system root directory:[Java]View PlainCopy DRWXRWXRWT root root 2009-06- :sqlite_stmt_journals DRWXRWX---system cache 2008-09- :Wuyi cache D---rwxrwx system system 1970-01- :xx sdcard lrwxrwxrwx root root 2009-06- : One,etc,/system/e

October 15:01 anaconda-ks.cfg-RW-------. 1 root root 1864 October 15:13 initial-setup-ks.cfgDrwxr-xr-x. 2 root root 6 October 24 15:13 PublicDrwxr-xr-x. 2 root root 6 October 24 15:13 templatesDrwxr-xr-x. 2 root root 6 October 24 15:13 VideoDrwxr-xr-x. 2 root root 6 October 24 15:13 's photosDrwxr-

modification:Defaults!VISIBLEPWAfter modification:Defaults VISIBLEPWBefore modification:### allow ROOT to run any commands anywhereRoot all= (All) allAfter modification### allow ROOT to run any commands anywhereRoot all= (All) allOracle All= (All) All--add a row hereWhen the above three modifications are complete, the save fileTest whether Oracle is normal sudo[Email protected] ~]$ ls-lh/root/Ls:cannot Open directory/root/: Permission denied[email protected] ~]$ sudo ls-l/rootWe Trust you are r

subdirectories under a file Command: ls-F/opt/soft | grep/$ List subdirectories under the/opt/soft File Output: [Root @ localhost opt] # ls-F/opt/soft | grep/$ Jdk1.6.0 _ 16/ Subscription-1.6.1/ Tomcat6.0.32/ Command: Ls-l/opt/soft | grep "^ d" List the sub-directories under the/opt/soft File Output: [Root @ localhost opt] # ls-l/opt/soft | grep "^ d" Drwxr-xr-x 10 root 4096 09-17 jdk1.6.0 _ 16 Drwxr-xr-x

Command: ls-F/opt/soft | grep/$ List subdirectories under the/opt/soft File Output: [root@localhostopt]#ls-F/opt/soft|grep/$jdk1.6.0_16/subversion-1.6.1/tomcat6.0.32/ Command: ls-l/opt/soft | grep "^ d" List the sub-directories under the/opt/soft File Output: [root@localhostopt]#ls-l/opt/soft|grep"^d"drwxr-xr-x10rootroot409609-1718:17jdk1.6.0_16drwxr-xr-x1610161016409610-1103:25subversion-1.6.1drwxr-

, rather than the link file itself. Select parameters: -- Reference = -- From = -- Help: displays help information. -- Version: displays version information. 4. Command instance: Instance 1.Change owner and group Command: chown mail: mail log2012.log [root@localhost test6]# ll---xr--r-- 1 root users 302108 11-30 08:39 linklog.log---xr--r-- 1 root users 302108 11-30 08:39 log2012.log-rw-r--r-- 1 root use

test6directory into A. gz file. Command: Copy codeThe code is as follows: gzip * Output: Copy codeThe code is as follows:[Root @ localhost test6] # llTotal 604--- Xr -- r -- 1 root mail 302108 11-30 linklog. log--- Xr -- r -- 1 mail users 302108 11-30 log2012.log-Rw-r -- 1 mail users 61 11-30 08:39 log2013.log-Rw-r -- 1 root mail 0 11-30 08:39 log2014.log-Rw-r -- 1 root mail 0 11-30 08:39 log2015.log-Rw-r

/command : ls-l/opt/soft | grep "^d"Lists the subdirectory details under the/opt/soft fileOutput :[Email protected] opt]# Ls-l/opt/soft | grep "^d"Drwxr-xr-x root root 4096 09-17 18:17 jdk1.6.0_16Drwxr-xr-x 1016 1016 4096 10-11 03:25 subversion-1.6.1Drwxr-xr-x 9 root root 4096 2011-11-01 tomcat6.0.32Example four: List the current working directory of all the name

Open_basedir is not empty, PHP can only access directories specified by Open_basedir Phpinfo () Look at this file.Loaded Configuration File/usr/local/php/etc/php.iniThe value of view php.ini is-------------------------------------------------------------------------------; Open_basedir, if set, limits all file operations to the defined directory; and below. This directive makes more sense if used in a per-directory; or per-virtualhost Web server configuration file. This directive is; *not* aff

inability to login management background (directly displayed as the verification code can not display properly);(2) PHPthe uploaded temporary folder is not set or no write permission, this will cause the file upload function is not available;(3)There are inexplicable errors, such as the installation of the display blank, this can be caused by the system does not load MySQL extension, for beginners, you can download Dede PHP package for easy use. 2, download unzip:[[email protected] tools] #wget

/local/python27/bin/iptest to755changing mode of/usr/local/python27/bin/ipython to755changing mode of/usr/local/python27/bin/ipcontroller to755changing mode of/usr/local/python27/bin/ipcontroller2 to755changing mode of/usr/local/python27/bin/ipengine2 to755changing mode of/usr/local/python27/bin/ipcluster to755Running install_datacopying Docs/man/ipython.1/usr/local/python27/share/man/man1copying Docs/man/ipengine.1/usr/local/python27/share/man/man1copying Docs/man/ipcontroller.1/usr/local/pytho

centos [root@ Docker5 home]# docker exex-ti os123/bin/bash [Root@d1a05a7d5efe/]# ll Total -rw-r--r--. 1 ro OT Root 18301 June 2 13:27 anaconda-post.log lrwxrwxrwx. 1 root root 7 June 2 13:25 bin gt; usr/bin Drwxr-xr-x. 5 root root 380 June 02:42 Dev drwxr-xr-x root root 4096 June 02:42 etc Drwxr-xr-x. 2 root root 6 Aug 12 2015 home Drwxr-

/command : ls-l/opt/soft | grep "^d"Lists the subdirectory details under the/opt/soft fileOutput :[Email protected] opt]# Ls-l/opt/soft | grep "^d"Drwxr-xr-x root root 4096 09-17 18:17 jdk1.6.0_16Drwxr-xr-x 1016 1016 4096 10-11 03:25 subversion-1.6.1Drwxr-xr-x 9 root root 4096 2011-11-01 tomcat6.0.32Example four: List the current working directory of all the name