Linux

1) Description of the problemScripts written by themselves do not have a problem at the command line and cannot be executed when writing to a timed task.The log for timed tasks also shows that this script was executed at this point in time, but no

I. Description of the STAGE1 phaseBIOS bootloader control to a single (STAGE1)1.stage1 related files and locationsThe bootloader in Stage1 in the first 446 bytes of 512 bytes, whose file location is/boot/grub/stage1. The following area represents

After three days plus a morning of efforts to toss, the local project finally ran up, Linux system, reinstall need to install basic php,nginx,mysql.php extension needs to install curl, memcache,memcached and so on. Then is to modify the

1, the BIOS power-on self-test: power-on self-test, testing hardware equipment. Then follow the CMOS sequence to search for a bootable device in the active state. It can be CD-ROM, floppy disk, USB, etc. 2. Load the master boot loader (MBR): The

Management of physical memory　　The Linux management physical memory is implemented using the paging mechanism. To make the paging mechanism work efficiently in 32-bit and 64-bit architectures, Linux employs a four-level paging strategy .Linux

1. Check the port number usage:[Plain]View Plaincopy Netstat-apn|grep 80 TCP 0 0 10.65.42.27:80 172.22.142.20:62771 established6426/lighttpd2. Determine the process numberDisplay for the above Red labelAfter you find the process number,

The core of the operating system, called Kernel, is the lowest-level, responsible for hardware-controlled things. How to learn Linux Linux uses, servers, embedded systems, because the core of Linux is very streamlined and can even

Gradually refine these later. Each knock is placed in the virtual machine, the virtual machine deleted, the script is gone. So write these things down in a blog.Sed-i "S#selinux=enforcing#selinux=disabled#g"/etc/sysconfig/selinuxSystemctl Disable

**********************************************This tutorial uses Windows as a client to log on to the centos6.7 system.SSH client software for SecureCRT7.1**********************************************1. Using SECURECRT to generate SSH public key

Solve the time zone problem in Embedded Linux If I want to do the upper-layer software work, I can do it with ease, but I am not familiar with platform work (system problem solving, driver writing, software porting, etc. Therefore, many problems are

Linux disk and file management In Linux O & M, O & M personnel mainly Manage Server I/O devices: disks and NICs. Here we mainly introduce disk management. Everything in Linux is a file, and the hardware device also has a corresponding file.

Linux task scheduler (at, crontab) In Linux, task plans are scheduled to execute certain tasks or periodically execute some tasks. Task Plan: Execute a task at a time in the future: at, batch Periodically execute a task: crontab After the task is

How to install OpenOffice for Ubuntu or Linux Mint OpenOffice is another very powerful Office suite that can replace Microsoft Office in addition to LibreOffice. OpenOffice is also integrated by many Linux distributions by default. I personally like

CentOS 7 memory EMD Management CentOS system startup process: POST --> Boot Sequence --> Bootloader --> kernel + initramfs (initrd) --> rootfs -->/sbin/init Innit program: CentOS 5: SysV init CetnOS 6: Upstart CentOS 7: Systemd New Features of

High Throughput System Design Optimization suggestionsHigh Throughput System For example, we need to arrange a plan for a project. Each module can run multiple tasks in parallel by multiple people, or work in serial by one or more people, but there

Install and configure Tomcat 7 in CentOS 6.5 Install and configure Tomcat 7 in CentOS 6.5 1. Download tomcat Cd/usr/local/src Wget http://mirrors.cnnic.cn/apache/tomcat/tomcat-7/v7.0.63/bin/apache-tomcat-7.0.63.zip Ii. Unzip and install tomcat Yum

Troubleshooting of 5000 + loads per Linux system per minute When I checked the Zabbix monitoring interface yesterday morning, I found that the number of processes and the load per minute on one of the servers had reached an astonishing number, the

Manually compile Hadoop 2.6.0 in 32-bit Ubuntu 14.04 Manually compile Hadoop 2.6.0 in 32-bit Ubuntu 14.04 When downloading the officially compiled package, the following error occurs: Unable to load native-hadoop library for your platform. Run the

Install Tomcat 8 in CentOS Install Tomcat 8 in CentOS Install Tomcat 8 Go to renewal. Put the apache-tomcat-8.0.26.tar.gz file in the/usr/local directory and execute the following script: # Cd/usr/local# Tar-zxvf apache-tomcat-8.0.26.tar.gz //

Install and configure Hadoop 2.7.1 in RedHat Linux 6.5 1. Build a Linux environment The environment I prepared is VM RedHat Linux 6.5 64bit.Set a fixed IP AddressVim/etc/sysconfig/network-scripts/ifcfg-eth0 Set the IP address to