Linux

17. Local Firewall, 17. FirewallLocal Firewall   [Root @ localhost root] # vi fw. sh #! /bin/bashmodprobe ip_conntrack_ftpIPT="iptables -A INPUT"iptables -F INPUT$IPT -i lo -j ACCEPT$IPT -p tcp -s 192.168.170.0/24 -m multiport \--dport 21,25,80,110

Configure OpenOCD + FT2232 in Ubuntu Configure OpenOCD + FT2232 in Ubuntu [1] confirm the debugger SolutionInsert the debugger to your computer. lsusb: Bus 003 Device 009: ID 1457: 5118 First International Computer, Inc. OpenMoko Neo1973 Debug

Use Virtualenv in CentOS6.5 to build the Python3 Development Environment Problem description Environment: CentOS6.5 To use Python3 for development in this environment, the default Python environment for CentOS6.5 is 2.6.6.Previously, Python3 was

How to temporarily clear Bash environment variables before running commands on Linux I am a bash shell user. I want to temporarily clear the bash shell environment variables. But I don't want to delete or unset an output environment variable. How

Common commands for Linux beginners Use dnf on Fedora to manage system updates The most amazing thing about a Linux-based system is that you can use the command line in the terminal to manage the entire system. The advantage of using command line

Ubuntu installation Image Browsing and manager Phototonic 1.6.17 Phototonic is an image browser and manager in Linux developed using C ++ and QT. Lightweight and fast. It does not depend on any desktop environment and supports multiple thumbnail la

Common commands for Ubuntu permission management Common commands for Ubuntu permission management 1. chmod Method 1 Chomd [{ugoa} {+-=}{ rwx}] [file or directory] U indicates the user to which the file belongs.G indicates the user group to

How to update the Linux kernel to improve system performance The development speed of the current Linux kernel is unprecedented. A major version is released every two to three months. Each Release brings several new features and improvements, which

Vim simple configuration Vim is a text editor that is powerful enough to have no friends. Friends who often use vim for editing must have a deep understanding. Below are some simple Vim configurations. (1) vim ~ /. VimrcEdit the following content,

How to install Fedora 22 in VirtualBox This article is intended for new Linux beginners. by presenting the entire installation process, Linxu beginners can complete the installation of Fedora. I also ask the predecessors to point out the

Hard drive Resizing in CentOS 7 * 1. Here we also want to resize the hard disk on CentOS7 installed in VMWare, and do not restart the virtual machine. The size of the/home directory before resizing is 348 GB, as shown in :* * 2. For details

How to add a virtual disk without restarting vmwarevm Recently, because the business needs to resize the system without restarting the system, the premise is that the system has been lvm, but there is not enough physical volume (hard disk), so a

Using RAID in Linux (III): using two disks to create RAID 1 (image) A raid image is a complete clone (or image) of the same data, which is written to two disks respectively. Creating a RAID 1 requires at least two disks and is only used when reading

Use the dd command to check hard disk I/O performance How can I use the dd command to test my hard disk performance? In linux, how does one check the read/write speed of a hard disk? You can use the following command to perform a simple I/O

Eight Taboos for Linux O & M Learning As Linux servers become increasingly popular in enterprises, the shortage of senior Linux O & M engineers is also increasing. At present, few colleges and universities that offer talent for enterprises offer

Install jenkins in linux Before installing jenkins, check that jdk and tomcat are configured. For details about the configuration method, refer to my blog; Jdk: jdk installation and configuration Tomcat: installation and configuration of tomcat

Laruence's Linux Private food-Basic Learning (third edition) (v) Chapter 5 install CentOS 5.x and multiple guide tips 1. Plan the exercise machine (especially partition parameters) It is divided into four partitions: 1)/boot: primary 2)/: primary 3)/

Basic linux operations-task scheduling commands In many cases, we need to do something at the specified time, such as backing up the system between AM and am. In this case, we need to use the task scheduling command.   It is required that the

Linuxkvm Virtual Machine NAT/BRIDGE configuration Host Nic Configuration: When you install KVM in NAT mode, it is configured by default. If not: Retrieve NAT:# Virsh net-define/usr/share/libvirt/networks/default. xml //

Ubuntu cannot access the graphic interface solution After the virtual machine is installed with Ubuntu, the login interface is displayed. The password is displayed in a black screen without any response. In this case, press Ctrl + Alt + F1 to enter