Tag:A sector

  • Linux system extends the partition where Oracle database is located

    Time:2021-10-7

    The production environment often encounters insufficient disk space. Next, let’s introduce the solution of LVM volume expansion. This article contains a long piece of code, which can be copied and slid to the left. I hope it will be helpful to you! Experimental environment System: centos7 The installation adopts LVM volume partition, and the Oracle […]

  • Operation and maintenance practice: Linux system expands the partition where Oracle database is located

    Time:2021-9-12

    The production environment often encounters insufficient disk space. Next, let’s introduce the solution of LVM volume expansion.Operation and maintenance practice: the Linux system extends the partition where the Oracle database is located. Operation and maintenance practice: the Linux system extends the partition where the Oracle database is locatedExperimental environment:System: centos7The installation adopts LVM volume partition, […]

  • Operation and maintenance practice: Linux system extends the partition where Oracle database is located

    Time:2021-6-27

    The production environment often encounters the situation of insufficient disk space. Next, we will introduce the solution of LVM volume expansion.Operation and maintenance: the partition where the Oracle database is extended by Linux system operation and maintenance: the partition where the Oracle database is extended by Linux systemThe experimental environment was as followsSystem: centos7The installation […]

  • Development of web call IC card reader Chapter 4 reading and writing IC card data

    Time:2021-6-9

    (IC card reader web reads and writes IC card data)Using the web plug-in of youwo Technology IC card reader can read and write the ordinary IC card. According to the actual business needs, you can manually click read and write and automatically read and write in the web page Read data from IC card web […]

  • Disk management of Linux system

    Time:2021-4-11

    With the gradual increase of things stored in the virtual machine, the hard disk of the virtual machine is also in urgent need, so it is urgent to expand a new virtual disk. Here’s how to add a new virtual disk to VMware: View existing disks [[email protected] ~]# lsblkNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTsda […]

  • Linux knowledge

    Time:2021-3-25

    Basics The five units of a computer include:input unit 、output unit 、control unit 、arithmetic logic unit 、Storage unitTop fivepart. The CPU occupies the control and arithmetic logic unit, and the storage unit contains memory and auxiliary memory; Unit of measurement Carry system Kilo Mega Giga Tera Peta Exa Zetta Binary 1024 1024K 1024M 1024G 1024T […]

  • Creating logical volume in Linux

    Time:2021-3-5

    Create partition [[email protected] lohr]# fdisk /dev/sdb Welcome to fdisk (util Linux 2.23.2). The changes stay in memory until you decide to write them to disk.Think twice before using the write command. Device does not contain a recognized partition tableUse the disk identifier 0xa7a34d5d to create a new DOS disk label. Command (enter m for help): […]

  • Creating swap partition in Linux

    Time:2021-3-3

    Create partition [[email protected] lohr]# fdisk /dev/sdb Welcome to fdisk (util Linux 2.23.2). The changes stay in memory until you decide to write them to disk. Think twice before using the write command. Command (enter m for help): P Disk / dev / SDB: 5368 MB, 5368709120 bytes, 10485760 sectors Units = sector of 1 * […]

  • Random talk on database (2)

    Time:2021-2-11

    Today, I don’t want to talk about gossip. I want to talk about something related to technology. From the very beginning, the database has met two major challenges: the reading and writing speed of the I / O device (hard disk) and how to update a record by multiple processes at the same time. Let’s […]

  • Grub learning notes

    Time:2020-12-10

    A few days ago, when I installed the system, I installed Ubuntu first and then windows. As a result, Ubuntu could not be loaded and the booting system with EasyBCD was not satisfactory. Later, I came into contact with grub and thought it was a magic thing. I studied it.Finally, the most profound understanding of […]

  • “Pi Zi Heng embedded semimonthly” issue 17

    Time:2020-10-18

    PI Zi Heng embedded semimonthly: issue 17 Here are some useful and interesting projects / tools and some hot news in the embedded field. The Lunar New Year is divided into 24 solar terms. We hope to release an issue on time on each festival day. This journal is an open source projectJayHeng/pzh-mcu-bi-weekly)You are welcome […]

  • LVM disk logical volume expansion

    Time:2020-10-12

    At the beginning of virtual machine installation, we chose LVM to partition the disk. Later, when the disk is not enough, it is very convenient to add, so there is the LVM expansion. This internal virtual machine is mainly used for sharing and data backup, which requires a large amount of disk space. Record the […]