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-i686 mysql[Root @ localhost local] # llTotal 76Drwxr-xr-x 2 root 4096 Oct 1 2009 binDrwxr-xr-x 2 root 4096 Oct 1 2009 etcDrwxr-xr-x 2 root 4096 Oct 1 2009 gamesDrwxr-xr-x 2 root 4096 Oct 1 2009 includeDrwxr-xr-x 2 root 4096 Oct 1 2009 libDrwxr-

by default) 0 means protocol (IP protocol) Use Socket_desc to refer to the pipe file, which is the same as the file descriptor, and then use the system function read () and write () to read and write data from the pipe file separately.Catalog FilesThis is a special file that can contain both ordinary files and other special files, which are hierarchically organized in the Linux file system starting from the root (/) directory. List the directory files under a directory:Output Example:D

) 0 means protocol (IP protocol) Use Socket_desc to refer to the pipe file, which is the same as the file descriptor, and then use the system function read () and write () to read and write data from the pipe file separately.Catalog FilesThis is a special file that can contain both ordinary files and other special files, which are hierarchically organized in the Linux file system starting from the root (/) directory.List the directory files under a directory:Output Example:Drwxr-

can view the directories stored in the $PATH as follows:$ echo $PATH/home/aaronkilik/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/ Local/gamesIn the above command, the directory/home/aaronkilik/binWill be searched first, followed by the/usr/local/sbinAnd then go on and on. In the search process, the search order is critical. For example, in the/usr/bin directory in the file system of the command $ ll/bin/.Example output:Total 16284drwxr-

#partitionclearinginformation# Empty all disk contents and initialize clearpart--all--initlabel#diskpartitioninginformation# Custom partition Part/boot--fstype= "Ext4" --size=500partswap--fstype= "swap" --size= 2000part/--fstype= "Ext4" --grow--size=1#Firewallconfiguration# The firewall is set to off Firewall--disabled#selinuxconfiguration#selinux set to Disabled selinux--disabled# Package Segment% Packages@base@core@desktop-debugging@dial-up@fonts@gnome-desktop@guest-agents@guest-desktop-agen

can view the directories stored in the $PATH as follows:$ echo $PATH/home/aaronkilik/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/ Local/gamesIn the above command, the directory/home/aaronkilik/binWill be searched first, followed by the/usr/local/sbin And then go on. In the search process, the search order is critical. For example, in the/usr/bin directory in the file system of the command $ ll/bin/. Example output: Total 16284drwxr-

subdirectories below it are not displayed -F Show file types -I. Displays the Inode number of the file in the first column of the output -L To display the details of a file in a long format -R Preserve order when sorting -T Sort by modified time -S Display the size of each file allocation in blocks -S Sort by file size Example: Displays simple information

MySQL always returns a problem, 8 hours earlier than the actual time. Check that there is a problem with the time zone configured in the URL of the JDBC connection, first jdbc:mysql://172.xx.xx.xx:3306/test?useunicode=truecharacterencoding=gbkusessl=true Usejdbccomplianttimezoneshift=trueuselegacydatetimecode=falseservertimezone=utc The possible parameters, such as GMT, GMT8, utc+8,utc0800, and so on, were all error. Later in the MySQL document found that the available time zones are in the/us

Explanation of the meaning of Drwxr-xr-x:LS-Al Gets the following list: Drwxr-xr-x4Oracle DBA4096May - One: -ORALOG1DRWXR-X--- -Root root4096May - -:WuyiRoot Explanation: D: The first bit represents the file type, D is the directory file, L is the link file ,-is the ordinary file, p is the pipe rwx: 2nd-The 4-bit represents the owner-owned permissions for this file. R is read, W is write, X is execute R-X

One: Users and Groups1 file Owner (user): is the owner of this file, has permissions to the file2 Group: Users within their group have access to files3 Others (Other):4 Linux user identities and group recorded filesBy default, information about super users and seven users is recorded in the/etc/passwd directory, the password is recorded under the/etc/shadow file, and all Linux group names are recorded in/etc/group.Two-file permissions concept: 1 Linux file propertiesLS is the list meaning, focus

Upload and download files to the local machine in Xshell (the folder in the dbserver that has been logged on through ssh for multiple times in linux) 1. list all sh FILES to be copied-bash-4.1 $ ll/mysqllog/osw /*. sh-rwxr-xr-x1mysqlmysql409May1610: 00/mysqllog... upload and download files to the local machine in Xshell (the folder in the dbserver that has been logged on through ssh for multiple times in linux) 1. list all sh FILES to be copied-bash-4

/arm:hello--> plan9/386:hello--> dragonfly/386:hello--> Dragonfly/amd64:hello--> Solaris/amd64:hello The following platform files are generated: $lltotal 16768drwxr-xr-x Wenke Staff 782-19:42. Drwxr-xr-x 7 Wenke Staff 238 12 28 16:21. -rw-r--r--1 Wenke Staff Wu 16:22 hello.go-rwxr-xr-x 1 Wenke staff 381420 19:42 hello_darwin_386-r Wxr-