Linux

Step 1Download Qt-opensource-linux-x64...run from QT websiteGiving files executable permissions on the Linux command line$ chmod u+x qt-opensource-linux...run$. /qt-opensource-linux...runStep 2Specify the QT installation directory, and then endTo

Production server:Os:centos 6.8Task: Yum upgrade #升级软件包, but does not change the software and system configuration and does not upgrade the kernel. Problem:Run Rpm_check_debugPerforming a transaction testTransaction Test Error:Installing package

Linux system logscontent in the 1.cat/etc/logrotate.conf file ( Dump = = Archive)# see ' Man logrotate ' for details# Rotate log Files WeeklyWeekly//= Cut once a week# Keep 4 weeks worth of backlogsRotate 4//After cutting, we retain up to 4 files

One: Vim configurationAuto IndentSet the number of tab spacesShow line NumbersThe above is just a word to set the configuration when the vim is opened.The configuration of the VIMRC file will be loaded when Vim startsTherefore, the setup of Vim is

In the morning a RABBITMQ and Java server, the client feedback Super card, see IO and CPU is not high. After finding sixty thousand or seventy thousand messages squeezed, the temporary problem solved, looking at/var/log/messages, found many tcp:time

20161124 Linux Common commands1. Findfind/etc/-size +50k-lsfind/etc/-size +50k-ls 2>/dev/nullView files larger than 50K in the directory and display them with the LS list,Understand the meaning of 2>/dev/null and hide all the rights2, pwd, LS, ls-a,

Special permissionsSSUID: When running a program, the owner of the corresponding process is the owner of the program file itself, not the initiatorchmod u+s Filechmod u-s FileHow the file itself has execute permission, suid display as S, otherwise

The Chkconfig command is primarily used to update (start or stop) and query run-level information for system services. Keep in mind that Chkconfig does not immediately automatically disable or activate a service, it simply changes the symbolic

1. First check if subversion is installed on the operating systemRpm-qa Subversion2. Install SubversionYum-y Install Subversion3. Specify the data storage path for SVNMkdir-p/application/svndata4. Specify the SVN profile information

In the read TCP cubic source code, encountered the Module_param (), the information found on the Internet as follows: Programming in the user state can pass command-line arguments through main (), while writing a kernel module can pass command-

command to enter VIVI FileName: Opens or creates a new file and places the cursor at the beginning of the firstVI +n FileName: Opens the file and places the cursor at the beginning of nthVI + FileName: Opens the file and places the cursor at the

/************************************************************************* * Linux systemd boot mechanism * said Ming: * heard that the Linux systemd start process to replace the previous SYSV init start process, so understand A * SYSTEMD work

1. View Linux-initiated servicesChkconfig--list queries out all currently running servicesChkconfig--list ATD Query The current state of the ATD service2. Stop all services and no longer start the next time the system starts, as

Shared memory is an interprocess communication method that allows two unrelated processes to access the same logical memory, and is a very efficient way to share and pass data between two running processes.Memory that is shared between different

Linux Related SCSI CommandAs a result of storage capacity in the previous period, more storage operations, the following records the commonly used operations;LSSCSI command: Display SCSI Device Information#lsscsi[0:0:0:2] Disk IBM 1726-4xx FAStT 0617

1. What is cut?The main purpose of this article is to give the author and readers a deeper understanding of how the Linux system works, the general content is to take Linux apart from the components to assemble, and then complete a micro Linux

Objective:Host network segment: 192.168.1.X Mask 255.255.255.0Virtual Machine Network segment: 192.168.2.X Mask 255.255.255.0Host: 192.168.1.45Client: 192.168.1.102Virtual machine: 192.168.2.16Because the company 192.168.1.X this network segment IP

Linux (5) _ hard disk partition, linux hard disk partition In Linux, the file management mechanism is called mounting and detaching to use files in partitions.   1. Hard DiskPartition Concept Overview: first, we need to have a preliminary

Use of custom RatingBar and custom ratingbar 1. Set the layout file and customize the ratingbar Style 1 6 7 8 17 18 26 27 36 37 2. Set the listener in activity 1 package com. example. ratingbar; 2 3 import android. app. activity; 4 import

Nvidia tesla K40 driver and cuda 7.5 Installation notes based on Ubuntu14.04 system, ubuntu14.04tesla Note 1: I am a newbie. I am welcome to criticize and correct the content that is not accurate in this article. NOTE 2: Knowledge reserves should