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Inode record file attributes/permissions and other data, each inode size is fixed to 128bytes; Each file consumes only one inode, so the number of files the file system can build is related to the number of inode.7. The actual data of the block record file of the file, the block of the directory records the comparison table of the filename and its inode number.8, log (joural) file system will be more than
actions in topM: Sorts based on the size of the resident memory.P: Sorts according to the percentage size of CPU usage.T: Sort by Time/cumulative time.1: Can toggle display of all CPU usage statusQ: Exit TopTOP-BN1 output all information at once, static displaySAR command Monitors system Status4 SARIt can monitor all the resource status of the system, we mainly use it to monitor the network card.1 Viewing
MVC Development Mode: The Model Layer View Layer control layer in the student management system, the model layer has a student entity class, data access to the DAO layer, The view layer is mainly used to display information interface, control layer is mainly servlet processing user requestsIn the student management system
MariaDb database management system learning (I) installation process diagram MariaDB
The MariaDB database management system is a branch of MySQL. it is mainly maintained by the open-source community and licensed by GPL. One of the reasons for developing this branch is that
parameter new information user nameFor example: Usermod-u 510 test Change the test user UID to 510-U Modify User-G Modify User Group-D Modify Home directory-S Modify shellpasswd Change your account passwordThis command has been introduced many times before, passwd without any parameters, meaning to modify the current login user's password, for ordinary users, you must enter the old password to change. The root user can reset the password of the normal user with the passwd followed by the user n
me comfort a lot, in addition to the child his father did a stupid thing to make me angry, all smooth. Well, this week's main content is probably summed up:1Introduction to Simple Linux commands2. Online Help for Linux systems3simple installation of Linux systems4management of users and Groups5. Management of files and directories6. Introduction to File Systems7. Compression \ Decompression and Packaging8Introduction to Remote control commands 0 Basi
Publish oneArticleManagement System and ForumProgram(Source Code), for learning and use only
Article management system:Function Description:1. Read navigation: sort by Article posting time. The last published article is displayed at the beginning. The content includes the article title and the article body containing 50 characters.2. Read ranking:
partition, format, verify, MountSplit: Partition fdiskFind the disk where the root directory is DF//dev/hdc2FDISK/DEV/HDC No numbersD:delete a partition N:add a new partition P:print the partition table Q:quit without saving changes W:write table to disk and exit n:+512mFormat: MKFSMKFS [-T file System format] Appliance file nameMkfs-t EXT3/DEV/HDC6CondLinux Learning -05-disk and file
#boot =/dev/SDA--Comment line default=0--Indicates that the kernel is the kernel that is loaded by defaultTimeout=5---Timeout value indicating how many seconds grub waits for the default kernel to loadSplashimage= (hd0,0)/boot/grub/splash.xpm.gz-The location of the splash screen image, providing a background image for the Grub menu Hiddenmenu---Tell grub default hidden menu title Red Hat Enterprise Linux as (2.6.9- +. ELSMP)---The header string root displayed on the kernel screen (hd0,0---Indica
LVM Management and Linux system installation1. Preface2.LVM Introduction and terminology3.LVM use4.Linux Partitioning5.Linux Installation ConsiderationsFirst, prefaceThis blog post records the learning experience of Linux, with a focus on the application of Logical Volume Manager (LVM, logical volume management) techno
Introduction to File system operations and Disk Management experimentsThe file system operation of this section of the experiment is very simple and contains only a few parameters of several commands, but mastering these will also help you in the process of learning about other courses in Linux and the lab building.
: freeNote: The difference between caching and buffering--caching is used to speed up the "read" of data from the hard disk, and buffering is used to speed up the data "write" to the hard diskDisplays the system start time and average load, which is the first line of the top command: UptimeView system and kernel related information: uname [options]option:-A To view all relevant information about the
at this point.-L: The system can also use the file system header name (label) to import a row mount, in addition to the device file name (for example,/DEV/HDC6) cookbook. It's best to canceled a unique name for your file system!-O: You can attach some additional parameters after mounting! For example, account number, password, read and Write permissions: RO, rw:
How messages are delivered
Two primitives for communication between processes
Send (Destination,message)
Receive (Sourse,message)
Synchronization of Message Delivery
Three modes of synchronization
Blocking receive
Addressing in message delivery
Indirect addressi
activeSystem to manage unit with target for ease of management systemctl list-unit-files --type=target systemctl list-dependencies multi-user.target //查看指定target下面有哪些unit systemctl get-default //查看系统默认的target systemctl set-default multi-user.target //设置系统默认的targetUnit target Service Three relationships:A service belongs to one type of unitMultiple unit consists of a target,A target contains multiple serviceCat/usr/lib/systemd/
Manager authority is not so heavy, the team member is more independent.3. Organizations that are difficult to measure with KPIs are better suited to OKR, such as research and development, marketing, and other companies ' support departments. And the Manufacturing department, sales department can be linked to orders, sales, profits, etc., they are more suitable for KPIs.Summarize:Okr is a way to help all of the company's staff to maintain a consistent direction, and more effectively to complete
reading and writing test, if the release two times-c-c, will test read and write (Read-write), will be slow ~-L: Can be followed by a header name (label)-j: Originally MKE2FS is EXT2, add-j, will join Journal and become EXT3.7. fsck to check the file system for errors8. Badblocks Check if the hard drive or floppy disk sector has bad track9. Mount,unmount Disk mount and dismountAttention:1) A single file system
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