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situations, Vista--Tour Shanxi villageSystem: Ubuntu 16.04LTS1\ official website Download mysql-5.7.18-linux-glibc2.5-x86_64.tar.gz2\ set up a workgroup:$su#groupadd MySQL#useradd-R-G MySQL MySQL3\ Creating a Directory#mkdir/usr/local/mysql#mkdir/usr/local/mysql/data4\ unzip the mysql-5.7.18-linux-glibc2.5-x86_64.tar.gz and copy to/usr/local/mysql#tar-ZXVF mysql-5.7.18-linux-glibc2.5-x86_64.tar.gz#cp-R/home/jieyamulu/mysql-5.7.18-linux-glibc2.5-x86_64/*/usr/local/mysql5\ Modify the MySQL user's

. mysql_history. pydistutils.cfg. Viminfo.. . bash_logout. bashrc. cshrc. Pip. TCSHRC Zhan Displays the file under the current file in column line format [Email protected] ~]# ls-1FuZhan Print user uid and GID [Email protected]/]# ls-nTotal 68Drwxr-xr-x 2 0 0 4096 Jul 2 14:21 Backuplrwxrwxrwx 1 0 0 7 Usr/bin Bin--Dr-xr-xr-x. 4 0 0 4096 June

Tianyang network technology alliance region I. unexpected Time: PM Location: a RedHatLinux machine: # uname-aLinux *. *. cn. net2.2.5-15 #1MonApr1923: 00: 46edt5oi686unknown Tianyang Network Technology AllianceWww.tian6.netBbs.tian6.com I. accidents　　Time: PM　　Location: a RedHat Linux machine:　　# Uname-Linux *. * .cn.net 2.2.5-15 #1 Mon Apr 19 23:00:46 EDT 1999 i686unknown　　I habitually advanced to/etc/rc. d/init. d. after reading it, I immediately found the exception:　　# Ls-la......-Rwxr-

Cause: the command fdisk is not in your command search path. Solution 1: Add fdisk to your command search path The method is as follows: First, check your current command search path: [Root @ localhost sbin] # echo $ PATH/Usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/bin:/usr/X11R6/bin: /home/vincent/binCheck the path of the fdisk command. [Root @ localhost home] # whereis fdiskFdisk:/sbin/fdisk/usr/share/man/man8/fdisk.8.gz We can see that the fdisk command is no longer in the current command

file. After Entering y, the system will delete the file. If you do not want to delete the file, the data is n. Www.2cto.com instance 2: forcibly delete the file. Command: rm-f log1.log output: [root @ localhost test1] # ll total 4-rw-r -- r -- 1 root 23 10-26 log1.log [root @ localhost test1] # rm-f log1.log [root @ localhost test1] # ll total 0 [root @ localhost test1] # instance 3: delete any. log File. Before deletion, run the "rm-I *" command to confirm the deletion *. log output: [root @ l

Test1 subdirectory and subdirectoriesCommand:Rm-r test1Output:[email protected] test]# LLTotal 24drwxr-xr-x 7 root root 4096 10-25 18:07 SCFDrwxr-xr-x 2 root root 4096 10-26 14:51 test1Drwxr-xr-x 3 root root 4096 10-25 17:44 test2DRWXRWXRWX 2 root root 4096 10-25 17:46 test3Drwxr-xr-x 2 root root 4096 10-25 17:56 test

before deletingCommand:Rm-i *.logOutput:[email protected] test1]# LLTotal 8-rw-r--r--1 root root one 10-26 14:45 log1.log-rw-r--r--1 root root 10-26 14:45 Log2.log[Email protected] test1]# rm-i *.logRM: Do you want to delete the generic file "Log1.log"? YRM: Do you want to delete the generic file "Log2.log"? Y[email protected] test1]# LLTotal 0[[email protected] test1]#Example four: Delete all the files in the Test1 subdirectory and subdirectoriesCommand:Rm-r test1Output:[email protected] test]

: The installation location of the third-party application;/SRV: Data used by services running on the system;/tmp: temporary file storage location;/usr:universal GKFX, read-only data;/var:variable Data files/proc: A virtual file system for outputting kernel-related process information;/sys: A virtual file system for outputting information about hardware devices on the current system;/selinux:security the storage location of information such as enhanced linux,selinux related security policy;[[ema

index node itself and other connections, only if the last connection is deleted, the file's data block and directory connection will be released. That is, the condition that the file is actually deleted is that all the hard connection files associated with it are deleted. (Note: Hard links cannot be created across partitions)Experiment: [[email protected] ~]# Ln/etc/yum.con (2) Blue mark for created hard links-rw-r--r--. 1 root root 0 Jul 05:47 2016-07-30.txt-RW-------. 1 root root 1389 Jul 15:

root 10-26 14:40 log1.log [Root@localhost test1]# rm-f Log1.log [Root@localhost test1]# LL Total 0[root@localhost test1]# Example three: Delete any. log file, ask for confirmation before deletingCommand:Rm-i *.logOutput: Copy Code code as follows: [Root@localhost test1]# LL Total 8 -rw-r--r--1 root 10-26 14:45 log1.log -rw-r--r--1 root 10-26 14:45 log2.log [Root@localhost test1]# rm-i *.log RM: Do you want to delete the generic file "Log1.log"? Y RM:

Total 24drwxr-xr-x 7 root root 4096 10-25 18:07 SCF Copy Code code as follows: Drwxr-xr-x 2 root root 4096 10-26 14:51 test1 Drwxr-xr-x 3 root root 4096 10-25 17:44 test2 DRWXRWXRWX 2 root root 4096 10-25 17:46 test3 Drwxr-xr-x 2 root root 4096 10-25 17:56 test4 Drwxr-

/include/netinet. Before compilation, ensure that the PATH variable contains/usr/include. Use the following command to compile lnsniffer: ?? $ Cc linsniffer. c-o linsniffer To run linsniffer, run the following command: ?? $ Linsniffer After 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.

Split the rectangle Time limit:2 seconds Memory limit:32768 KB Alice comes up with a new game and wants to play with Bob. There is one rectangle on the paper initially, we define its lower-left corner's coordinate is (XL, yl) and upper-right corner's coordinate is (XR, yr ). Bob has executed the step as description below n times: Bob shoshould select one empty rectangle. if the rectangle is the initial one or is

cobbler对象组, this process is time consuming [[email protected] ~]# Cobbler distro List # View the corresponding distribution centos-7.2-x86_64The image is automatically imported into the/var/www/cobbler/ks_mirror, followed by HTTP to obtain the installation source;By default, cobbler also generates a minimized installed kickstart file, which is/VAR/LIB/COBBLER/KICKSTARTS/SAMPLE_END.KS by default. If we want to customize the kickstart file, you can do the following:[[email protected] ~]# CP ce

[root@nfs-server ~]# ll /etc/rsync.password 6 -rw-------. 1 root root 7 Jan 31 00:49 /etc/rsync.password7 [root@nfs-server ~]# 2.1.3 manually push data from the NFS client/data/directory to the rsync Hot backup Server/backup Directory 1 [root @ nfs-server data] # showmount-e localhost # Check the shared directory 2 Export list for localhost: 3/data 192.168.1.0/24 4 [root @ nfs-server ~] # Cd/data/5 [root @ nfs-server data] # ll 6 total 12 7-rw-r --. 1 nfsnobody 0 Jan 30 0:05 beautiful.txt 8-rw

). In the future, you do not need to enter the complete PATH in the command line, just enterMatlabYou can. Maintain old operation habits For example, in SuSE, the start script is placed in/Etc/init. dDirectory, while in the release of RedHat/Etc/init. d/rc. dDirectory. To avoid the problem that the administrator cannot find the location because the system switches from SuSE to RedHat, we can create a symbolic link./Etc/init. dPoint it/Etc/init. d/rc. dYou can. In fact, the RedHat release also

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 .? File Permission. Let's use the ls-l command to see a typical file: root @ ubuntu :~ /Resource/mini2440/file-system # ls-ltotal 11488drwxr-xr-x 33 root 4096 2013-04-17 busybox-1.17.3-rwxrw-r

The relevant modules and functions that can execute shell commands are: Os.system os.spawn* os.popen*--Waste popen2.*--Waste commands.*-Discarded, removed in 3.x The functions of the relevant modules and functions for executing shell commands are implemented in the Subprocess module and provide richer functionalityPagerParent process waits for child process to completeReturn exit information (ReturnCode, equivalent to Linux exit code)Executes a command, returns a st

In the Linux system,/on behalf of the root directory, there are many folders under the root directory, below to understand together # CD/# Ls-alTotal 448Drwxr-xr-x 2 root root 4096 may 04:02 binDrwxr-xr-x 2 root 4096 Sep 2013 SbinDrwxr-xr-x root root 4096 Feb 04:02 Lib Drwxr-xr-x root root 4096 June 10:55 HomeDrwxr-x

:--reference=directory or file>Use the specified directory/file as a reference and set the operating file/directory to the same owner and group as the reference file/directory--from=Current User: Current group> Changes are made only if the current user and group are the same as the specified user and group--help display Help information--version display version information 4. Use instance: Instance 1: Change owner and Group command: chown mail:mail log2012.log output: Copy code [[emailprotected]