1、firewalld的基本操作 启动： systemctl start firewalld查看状态： systemctl status firewalld 停止： systemctl disable firewalld禁用： systemctl stop firewalld 2、使用firewalld 查看版本： firewall-cmd –version查看帮助： firewall-cmd –help显示状态： firewall-cmd –state查看所有打开的端口： firewall-cmd […]
1. yum -y install vsftp 2. 修改/etc/vsftpd/vsftpd.conf 文件： anonymous_enable=NO local_enable=YES write_enable=YES chroot_local_user=YES pasv_min_port=10000 pasv_max_port=11000 userlist_file=/etc/vsftpd/user_list userlist_deny=NO 3. 开放端口 sudo firewall-cmd –permanent –add-port=20-21/tcp sudo firewall-c […]
What is CPU?CPU is a brain of a computer. It called Central Process Unit. CPU fetches and executes instructions. CPU consists of an Arithmetic and Logic Unit (ALU), a control unit, registers and buses. Part of CPUALU: is a digital circuit that calculates an arithmetic operation (like an addition, su […]
cmd对话框中Debug指令学习一、DEBUG的主要指令： 点击开始–>点运行–>在运行对话框中输入cmd–>在输入debug 1、显示存储单元的指令D(DUMP)格式为：_D或_D 例如按指定范围显示存储单元内容的方法为：-d100 12018E4:0100 c7 06 04 02 38 01 c7 06-06 02 00 02 c7 06 08 02 G…8.G…..G…18E$:0110 02 02 bb 04 02 e8 02 00-CD 20 50 51 56 57 8B 37 ..;..h.. […]