Linux

kuang:~$ TR--helpusage:tr [OPTION] ... SET1 [SET2] Translate, Squeeze, and/or Delete characters fromStandard input,writing to standard output. -C,-C,--complement Use the complement of SET1-D,--delete delete charactersinchSET1, DoNot

Applicable system: Linux (Redhat, Centos,debian,ubuntu)* The Linux cloud Server data disk is not partitioned and formatted, and can be partitioned and formatted according to the following steps.The following operation will divide the data disk into

after logging into the Linux system, if you want to see if the machine is configured with a few CPUs, how many threads, you can use the following command in the shell: cat/proc/cpuinfo , this will list all the CPU information. There are many

1. View Run level commands# RunLevel2. Explanations at all levels:Init 0 Terminates all processes, that is, shutting down the machineInit 1 Single-user mode, equivalent to the security mode of Windows, usually with the password changeInit 2

[Account ~]$ command [-options] Parameter1 parameter2 ... directive option parameter (1) parameter (2)Description: 0. The first input part of a line of instructions is definitely "command" or "executable"1. Command for the name of the instruction,

2 Hardware DesignThe hardware design of this subject includes the main controller, data transmission design, data acquisition design, control drive design, display design, and door access design.2.1 Host ControllerAccording to the plan three select

TECPLOT. chorus.2015.r2.win.linux.x64 CFD Simulation AnalysisTecplot Chorus provides a new tool for engineers to analyze large amounts of simulation data. Tecplot Chorus integrates meta-data analysis, post-processing, and analog data management

Set up the ftp service in linux and the linuxftp Service1. Configuration/Etc/passwd/Etc/group/Etc/vsftpd. conf # configuration file/Usr/sbin/vsftpd # Main Program/Etc/vsftpd/ftpusers # blacklist. You cannot log on to the ftp server as long as it is

Linux crontab usage notes and linuxcrontab notes1. InstallService crond statusYum install vixie-cronYum install crontabs2. InstancePrint the current time to the log file every minute# Crontab-e*/1 ***** date>/tmp/date.txt# Tail-f/tmp/date.txt (this

Linux disk management notes, linux disk notesDisk Management1. df view disk partition usage-L only display local disks (default)-A: displays the disk usage of all file systems.-H: Calculate the disk capacity in December 1024.-H: Calculate the disk

Linux smartmontools and linuxsmartmontools Smartmontools is an open-source Disk control and monitoring tool that runs on Linux, Unix, BSD, Solaris, Mac OS, OS/2, Cygwin, and Windows, it can also run from the boot disc or boot floppy disk,

The problem that the VM ubuntu cannot be connected to the Internet1. Make sure that both the VMware DHCP Service and the VMware NAT Service are enabled.2. Add sudo vim/etc/network/interfaces as follows:Auto eth0Iface eth0 inet dhcp3. sudo ifdown eth0

Linuxvmstat (system IO)1. vmstat Displays the status values of servers at a given interval, including CPU usage, memory usage, virtual memory switching, and IO read/write.Vmstat 2 102: every 2 s10: 10 Statistics2. res Procs ---- memory -----swap---

Install Mysql in rpm mode in RedHat5.8 I want to install Mysql 5.6 ..1. Prepare the file:1) Mysql-client-5.6.24-1.rhel5.x86_64.rpm2) Mysql-server-5.6.24-1.rhel5.x86_64.rpm2. Remove the Mysql version from the system: yum remove mysql*; 3. Install the

Install jdk under linuxubuntu14.04First, download JDK from oracle.com. I downloaded the jdk-8u51-linux-x64.tar.gz version. There is an rpm file on the official website. This is an installation version of RedHat. First, I downloaded this version and

Linux OOM Terminator It is six o'clock AM. When I woke up, I was summing up what made my wake-up alarm so much in advance. At the beginning of the story, the cell phone just stops. I looked at my cell phone and saw if I was so crazy that I set the

Nginx 1.6.0 plug-in development record in RHEL 6.4 Nginx 1.6.0 plug-in development record in RHEL 6.4 1. nginx compilation and deployment#./Configure -- with-poll_module -- with-http_ssl_module -- with-file-aio -- with-ipv6# Make install#

Install and configure Zabbix monitoring in Linux Zabbix installation Configuration Build a Linux environment:Server 192.168.11.11Client 192.168.11.100 1. Install zabbixYum install-y epel-release Install the rpm package in the lamp EnvironmentYum

Install Linux server with PXE Recently, I encountered a problem where the Linux server in the company was old and the optical drive was broken, and the USB flash drive was not supported. Therefore, I had no choice but to use pxe to install the

Monitor whether the running service is normal and send an email alert Monitoring Service, which is a task placed on crontab. I do not like to run it in the background using an endless loop. Therefore, three cycles are executed each time. If any of