【原】【BG】-一次虛擬化環境實踐簡要記錄
阿新 • • 發佈：2019-01-17
部分涉及到Linux、Nginx、tomcat、MySQL等的點滴操作記錄，時間長了，就忘掉了，偶爾整理一下操作的history，就此簡要備份一下：
SQL相關：
前幾天，搞了一臺PowerEdge R720機架伺服器，在上面搭建了一套虛擬化環境，將一臺硬體虛成了多臺，滿足基本使用。
恰好今天有空，這裡做一下簡單的記錄。
1.過去的記憶
上次搞虛擬化之類伺服器這種事情，還是2011年的時候了。
記得那時候用的還是Ubuntu 11.04，而且那時候搞得比現在要複雜得多，那時候Openstack才剛剛興起，還不穩定，整天看的都是英文文件，在與openstack的各種不穩定作鬥爭；
那時候我去還參與openstack初期時候的中國區會議，還申請幫忙一起進行活動場地相關準備與支援性工作；
轉眼這些年，技術迭代了Docker、K8S，熱門技術又變了，滄海桑田一般。
2.關於雲的看法
另外關於自建伺服器，可能每個人的觀點不同。我自己的看法如下：
1.相對具體的資料本身而言，選擇雲伺服器比本地伺服器，更為安全；我這裡說的安全，是指資料不丟失，是雲本身的IAAS層RAID+多副本+異地災備等天然屬性所決定的；但賬號密碼等上層應用服務層的安全是另外一回事；很多人認為雲不安全，其實是對後者不放心；但就IAAS層而言，還無爭議的肯定是雲服務更安全；
2.雲服務的成本更低，效率更高；選擇雲服務，雲服務供應商的規模化運營降低了成本，技術資源更強大，處理問題更快；本地的話可能需要運維人員，需要另外增加額外成本，而且單槍匹馬，難以與一個技術team的戰鬥力匹敵；
3.雲服務整合的第三方附加產品可以使用，很多不需要再去自建，節省時間；
4.雲服務擴充套件更靈活，按需採購使用，而不是像本地，搭建環境時候的架構本身就決定了可以支撐多少計算、儲存、網路能力；
。。。
anyway，做好當下的事情，說幹就幹，我先把雲服務搞起來再說，前幾天已經高過了，現在將部分要點簡要記錄一下；
在搞得過程中，我參考了部分其他人的經驗，部分可能還有用處，參考的部分URL如下：
本來想詳細分步驟記錄一下，但是時間緊急，就偷懶了，我先把主要思路寫一下，然後通過history中把之前部分用到的命令貼出來，如果有需要的可以參考；
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基本步驟要點：
1.先檢查硬體配置，並給硬體裝置做RAID；
2.下載系統映象，推薦CentOS或者UbuntuServer版本；
3.使用USB製作虛擬啟動盤；
4.使用虛擬盤安裝作業系統；
5.Centos網路與橋接配置等；
6.虛擬化層（Virt-manager\QEMU-KVM）安裝；
7.VNC-Viewer安裝；
8.虛擬機器映象製作；
9.虛擬機器叢集規劃管理，單臺虛擬機器啟動與配置等；
10.虛擬機器內部環境配置，虛擬機器之間配置與管理；
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硬體伺服器：戴爾PowerEdge R720 機架式伺服器
具體操作步驟，現在不詳細記錄了，我直接history了一下操作的部分歷史如下，供參考：
[[email protected] ~]# history | cut -c 8- > history su - haochuang clear yum install -y net-tools dmesg |grep eth ls /sbin ls /sbin/if* ls /etc/sysconfig/network-scripts/ cd /etc/sysconfig/network-scripts/ ls cat ifcfg-em1 dmesg |grep -in eth ifconfig cat /etc/default/grub yum install -n net-tools cat /etc/default/grub service start network service restart network sudo reboot yum install -n net-tools yum install -y net-tools ping www.baidu.com cd /etc/sysconfig/network-scripts/ ls -la vi ifcfg-em1 cat ifcfg-em1 cat ifcfg-em2 cat ifcfg-em1 vi ifcfg-em1 sudo reboot ping www.baidu.com vi /etc/sysconfig/network-scripts/ cd /etc/sysconfig/network-scripts/ ls cp ifcfg-em1 ifcfg-eth0 vi ifcfg-eth0 service network restart systemctl ifup eth1 ifup eth0 systemctl systemctl list-unit-files vi ifcfg-eth0 ls cp ifcfg-em1 ifcfg-em0 cp ifcfg-eth0 ifcfg-em1 service network restart systemctl ifdown ifcfg-em1 ifup ifcfg-em1 ip addr cat ifcfg-em1 ifdown ifcfg-em1 ifup ifcfg-em1 find / name "ifconfig" find / name "ifconfig" | more /etc/init.d/network restart systemctl ip addr ip link whow ip link show ip addr show ls -la cat ifcfg-em1 cat ifcfg-em4 vi ifcfg-em4 ifup ifcfg-em4 ip addr ifconfig ping www.baidu.com service sshd status yum install net-tools ifconfig pwd ls -la cat ifcfg-em4 uname -a arch cat lsb_release cat /prod/lsb_release yum install qemu-kvm libvirt virt-install bridge-utils yum install qemu-kvm libvirt virt-install bridge-utilslsmod | grep kvm lsmod | grep kvm systemctl start libvirt yum install qemu-kvm libvirt virt-install bridge-utils systemctl start libvirtd systemctl enable libvirtd pwd ls -la cp ifcfg-em0 ifcfg-br0 vi ifcfg-br0 ping 192.168.1.100 ping 192.168.1.101 ping 192.168.1.200 vi ifcfg-br0 ls -la cp ifcfg-em4 ifcfg-bond0 vi ifcfg-bond0 ifconfig vi ifcfg-br0 ifconfig systemctl restart network ls -la vi ifcfg-bond0 vi ifcfg-em4 cat ifcfg-em4 ifcfg-bond0 mv ifcfg-em4 ifcfg-em4.bak mv ifcfg-bond0 ifcfg-em4 ifconfig ifconfig | more systemctl restart network ifconfig | systemctl restart network | moew systemctl restart network | more systemctl restart network ls -la vi ifcfg-br0 vi ifcfg-em4 systemctl restart network systemctl status network.service ifdown ifcfg-br0 ifdown ifcfg-em4 vi ifcfg-em4 ifdown ifcfg-em4 ifconfig ifup br0 ifup ifcfg-em4 vi ifcfg-em4 ifconfig vi ifcfg-em4 systemctl status network.service systemctl restart network systemctl status network.service ls-la ls -la ip addr ip a ifup ifcfg-br0 ip addr ip a ifconfig ifconfig | more ls /vat/lib/libvirt/images ls /var/lib/libvirt/images ls /var/kvm/images mkdir -p /var/kvm/images ls /var/kvm/images man virt-manager ifconfig | more cat ifcfg-em4 cat ifcfg-br0 vi ifcfg-em4 systemctl restart network ifdown ifcfg-em4 ifdown ifcfg-br0 ifconfig | more ifup ifcfg-br0 ifconfig | more ifup ifcfg-em4 cat ifcfg-em4 cat ifcfg-br0 df -lh egrep '(vmx|svm)' /proc/cpuinfo vi /etc/sysconfig/selinux yum install epel-release net-tools vim unzip zip wget ping www.baidu.com ifup ifcfg-br0 ping www.baidu.com ifconfig ifconfig | more ifup ifcfg-br0 systemctl restart network ping www.baidu.com vi ifcfg-em4 systemctl restart network ifup ifcfg-em4 ifdown ifcfg-em4 ifup ifcfg-em4 ip a ifup ifcfg-br0 ifdown ifcfg-br0 ifup ifcfg-br0 ping www.baidu.com systemctl restart network ping www.baidu.com vi ifcfg-br0 vi ifcfg-em4 ls -la cp ifcfg-em4 ifcfg-em4.bak.201804081511 ls -la vi ifcfg-em4 systemctl restart network system status network.service systemctl status network.service ls mv ifcfg-eth0 bak.ifcfg-eth0 mv ifcfg-em0 bak.ifcfg-em0 ls mv ifcfg-em4.bak bak.ifcfg-em4.bak ls mv ifcfg-em4.bak.201804081511 bak.ifcfg-em4.bak.201804081511 ls -la la ls sudo reboot ifcondfig ifconfig ifconfig | moer ifconfig | more ping www.baidu.com ip addr service network restart cd /etc/networks/ cd /sysconfig ls cd / ls cd /etc/sysconfig/network cd /etc/sysconfig/network-scripts/ ls -la ip a cat ifcfg-br0 cat ifcfg-em4 ip addr show ip addr cat ifcfg-br0 vi ifcfg-br0 cat ifcfg-br0 cat ifcfg-em4 vi ifcfg-br0 cat ifcfg-em4 systemctl restart nwtwork systemctl restart network journalctl -xe cat /var/log/messages | grep network vi /etc/resolv.conf vi /var/log/messages systemctl restart network journalctl -xe arp -a ifconfig ifconfig | more ping 192.168.1.1 journalctl -xe service ssh status service sshd status journalctl -xe | more cat /var/log/messages | grep network clear cat /var/log/messages | grep network | more exit ifconfig yum install epel-release net-tools vim unzip zip wget ftp -y ping www.baidu.com ifconfig service network restart journalctl -xe ls -la cd /etc/sysconfig/ ls -la cd network cd network-scripts/ ls -la vi ifcfg-br0 service network restart systemctl status net systemctl status network.service systemctl stop NetworkManager systemctl disable NetworkManager systemctl start network.service ifconfig journalctl -xe egrep '(vmx|svm)' --color=always /proc/cpuinfo lsmod | grep kvm sestatus yum install kvm libvirt python-virtinst qemu-kvm virt-viewer tunctl bridge-utils avahi dmidecode qemu-kvm-tools virt-manager qemu-img virt-instal l net-tools libguestfs-tools -ysystemctl start libvirtd systemctl enable libvirtd virsh -c qemu:///system list ifconfig yum install qemu-kvm libvirt virt-install bridge-utils -y systemctl start libvirtd systemctl enable libvirtd systemctl status libvirtd systemctl is-enabled libvirtd pwd ls -la cd pwd cd /home ls -la groupadd haogroup useradd -g haogroup -d /home/haoop -m haoop -p haoop ls -la su - haochuang mkdir iso ls -la cd iso ls -la cd .. ls -la mkdir -p /home/kvm-bak ls -la vi /etc/sudoers yum install vsftpd vi /etc/vsftpd/user_list service vsftpd restart su - haochuang vi /etc/vsftpd/vsftpd.conf /etc/init.d/messagebus restart yum install -y kvmvirt-* libvirt bridge-utils qemu-img virt-install /etc/init.d/libvirtd start mkdir /data/ ls -la cd da cd /data ls -la cat /proc/cpuinfo virt-install --name scm --ram 8096 --disk path=/data/scm.img,size=30 --vcpus 2 --os-type linux --os-variant rhel7 --network bridge=br0 --graphic s none --console pty,target_type=serial --location'http://mirrors.163.com/centos/7/os/x86_64/' --extra-args 'console=ttyS0,115200n8 serial' virt-install --name scm --ram 8096 --disk path=/data/scm.img,size=30 --vcpus 2 --os-type linux --os-variant rhel7 --network bridge=br0 --graphic s none --console pty,target_type=serial --location'http://mirrors.163.com/centos/7/os/x86_64/' --extra-args 'console=ttyS0,115200n8 serial'virt-install --name scm --ram 8096 --disk path=/data/scm.img,size=30 --vcpus 2 --os-type linux --os-variant rhel7 --network bridge=br0 --graphic s none --console pty,target_type=serial --location 'http://mirrors.163.com/centos/7/os/x86_64/' --extra-args 'console=ttyS0,115200n8 serial' pwd cat /etc/ssh/sshd_config cat /etc/ssh/sshd_config | grep X11Forwarding vi /etc/ssh/sshd_config passwd haoop pwd ls -la cd /home ls -la chown haoop:haogroup iso -R ls -la cd iso/ ls -la firewall-cmd --zone=public --add-port=5910/tcp --permanent firewall-cmd --reload yum install tigervnc yum -y install tigervnc-server ls -la pwd cd .. ls -la cp iso/CentOS-7-x86_64-DVD-1708.iso kvm-bak/ cd kvm-bak/ ls -la cd .. ls -la chown haoop:haogroup kvm-bak -R ls -la cd kvm-bak/ ls -la su - haoop ls -la virt-install --network bridge=br0,model=virtio --name hao --ram=8096 --vcpus=3 --disk path=/home/kvm-bak/vm-images/hao.img,size=10,bus=virtio --c drom /home/kvm-bak/CentOS-7-x86_64-DVD-1708.iso --graphics none --noautoconsole --acceleratels /home/kvm-bak/vm-images rm -rf /home/kvm-bak/vm-images/hao.img virt-install --network bridge=br0,model=virtio --name hao --ram=8096 --vcpus=3 --disk path=/home/kvm-bak/vm-images/hao.img,size=10,bus=virtio --c drom /home/kvm-bak/CentOS-7-x86_64-DVD-1708.iso --graphics none --noautoconsole --acceleratevirt-install --network bridge=br0,model=virtio --name haotest --ram=8096 --vcpus=3 --disk path=/home/kvm-bak/vm-images/hao.img,size=10,bus=virtio --cdrom /home/kvm-bak/CentOS-7-x86_64-DVD-1708.iso --graphics none --noautoconsole --acceleratevirt-install --network bridge=br0,model=virtio --name haotest --ram=8096 --vcpus=3 --disk path=/home/kvm-bak/vm-images/haotest.img,size=10,bus=vi rtio --cdrom /home/kvm-bak/CentOS-7-x86_64-DVD-1708.iso --graphics none --noautoconsole --acceleratels -la cd vm-images/ ls -la virsh console haotest ping www.baidu.com w ps -ef | grep virsh kill -9 16381 pwd ls -la cd ls -la cd /home ls -la cd .. ls -la cd data ls -la virt-namager virt-manager ls -la rm -rf scm.img ls -la virt-install --network bridge=br0,model=virtio --name vm1 --ram=768 --vcpus=1 --disk path=/vm-images/vm1.img,size=10,bus=virtio --location 'http: //mirrors.163.com/centos/7/os/x86_64/' --graphics none --noautoconsole --acceleratevirt-manager ssh -X 192.168.1.200 virt-manager clear virsh --help |grep undefine virsh list --all virsh destory scm virsh destroy scm yum -y install http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-8.noarch.rpm yum -y install git python-pip libvirt-python libxml2-python python-websockify supervisor nginx yum -y install gcc python-devel pip install numpy mkdir /application/ cd /application/ git clone git://github.com/retspen/webvirtmgr.git git clone https://github.com/retspen/webvirtmgr.git wget http://www.sqlite.org/sqlite-3.5.6.tar.gz netstat -an |grep 5901 service vncserver restart yum -y install wget wget http://www.sqlite.org/sqlite-3.5.6.tar.gz ls -la cd sqlite-3.5.6/ tar -xvf sqlite-3.5.6.tar.gz cd sqlite-3.5.6/ ls -la ./configure --disable-tcl make;make install cd /application/webvirtmgr ls -la pip install -r requirements.txt pip install -r cat requirements.txt ./manage.py syncdb rpm -y install django pip install -r requirements.txt yum -y install pip export PATH=$HOME/bin:/usr/local/bin:$PATH export PATH=$HOME/bin:/usr/local/python27/bin:/usr/local/bin:$PATH source .zshrc yum -y install pip pip install -r requirements.txt yum install epel-release yum install -y python-pip pip install -r requirements.txt ./manage.py syncdb ./manage.py createsuperuser mkdir -pv /var/www mkdir -p /var/www cp -Rv /application/webvirtmgr /var/www/webvirtmgr vi /etc/sysconfig/libvirtd vi /etc/libvirt/libvirtd.conf vi /etc/nginx/nginx.conf systemctl restart libvirtd.service vi /etc/nginx/conf.d/webvirtmgr.conf yum install -y nginx vi /etc/nginx/conf.d/webvirtmgr.conf ifconfig ll /home/kvm-bak/vm-images ll /home/kvm-bak/ clear yum -y install qemu-kvm libvirt virt-install bridge-utils lsmod | grep kvm systemctl start libvirtd systemctl enable libvirtd cat /etc/sysconfig/network-scripts/ifcfg-br0 cd /etc/sysconfig/network-scripts/ ls cat ifcfg-br0 systemctl restart network systemctl status network.service clear ifconfig virt-install --network bridge=br0,model=virtio --name haochuang --ram=8096 --vcpus=3 --disk path=/home/kvm-bak/vm-images/haochuang.img,size=10,bus=virtio - -cdrom /home/kvm-bak/CentOS-7-x86_64-DVD-1708.iso --graphics none --noautoconsole --acceleratefirewall-cmd --zone=public --add-port=5910/tcp --permanent firewall-cmd --reload virsh list --all virsh start hao virsh start haochuang cat /proc/cpuinfo | egrep ‘vmx|svm’ cat /proc/cpuinfo | egrep 'vmx|svm' virsh list virsh list --all history lsmod | grep kvm ll /dev/kvm brctl show ifconfig |head -20 ping www.baidu.com yum -y install libcanberra-gtk2 qemu-kvm.x86_64 qemu-kvm-tools.x86_64 libvirt.x86_64 libvirt-cim.x86_64 libvirt-client.x86_64 yum -y install libcanberra-gtk2 qemu-kvm.x86_64 qemu-kvm-tools.x86_64 libvirt.x86_64 libvirt-cim.x86_64 libvirt-client.x86_64 libvirt-java.noarc h libvirt-python.x86_64 libiscsi-1.7.0-5.el6.x86_64 dbus-devel virt-clone tunctl virt-manager libvirt libvirt-python python-virtinstyum groupinstall "X Window System" yum install -y dejavu-lgc-sans-fonts yum groupinstall -y "Fonts" systemctl enable libvirtd systemctl start libvirtd ll /data/iso ll /data mkdir -p /data/iso ls -la ls /home/iso/ cp /home/iso/CentOS-7-x86_64-DVD-1708.iso /data/iso ls /data/iso netstat -anp | grep 5901 yum -y install kvm python-virtinst libvirt tunctl bridge-utils virt-manager qemu-kvm-tools virt-viewer brctl show lscpu ls /var/lib/libvirt/images ls -la ls /data/iso/ virt-install --name haochuangVM0409 --ram 8096 --vcpus 3 -f /home/kvm-bak/vm-images/haochuangVM0409.qcow2 --os-type linux --os-variant rhel6 --network brid ge=br0 --cdrom /data/iso/CentOS-7-x86_64-DVD-1708.iso --graphics vnc,listen=0.0.0.0,port=5920rpm -qf /usr/bin/virt-install ls /usr/bin/qemu-kvm virt-install --os-variant list virsh list --all /usr/bin/qemu-kvm modprobe kvm systemctl stop firewalld.service modprobe kvm-intel lsmod | grep kvm yum install -y qemu-kvm libvirt virt-manager qemu-kvm-tools yum install vnc-server tigervnc -y vncpasswd qemu-img create -o preallocation=metadata -f qcow2 /home/kvm-bak/vm-images/cent7.qcow2 20G ls /home/kvm-bak/vm-images/cent7.qcow2 -la netstat -an | grep 5902 ps -ef | grep vnc yum install vnc-server tigervnc -y service vnc status /bin/systemctl tatus /bin/systemctl status ps aux | grep kvm iptables -L ls /etc/systemd/system/[email protected]:6.service ls /etc/systemd/system/vncservice ls /etc/systemd/system/vncservice* sudo systemctl stop firewalld.service sudo systemctl disable firewalld.service sudo systemctl daemon.reload sudo systemctl stop firewalld.service service vncserver restart vncserver service vncserver restart yum groupinstall Desktop ping www.baidu.com yum install tigervnc-server yum install xorg-x11-fonts-Type1 vi /etc/sysconfig/vncservers service vncserver restart yum update vncserver -kill :1 service vncserver stop service vncserver restart service vncserver start service vncserver restart yum check-update yum groupinstall "X Window System" yum install gnome-classic-session gnome-terminal nautilus-open-terminal control-center liberation-mono-fonts yum install tigervnc-server -y ls /etc/systemd/system/ cd /etc/systemd/system/ ls ls /lib/systemd/sytem/[email protected] ls /lib/systemd/sytem/vncserver ls /lib/systemd/sytem/vncserver* ls /lib/systemd/sytem/ ls /lib/systemd/system/[email protected] cp /lib/systemd/system/[email protected] /etc/systemd/system/[email protected]:1.service vi /etc/systemd/system/[email protected]:1.service systemctl daemon-reload sudo systemctl enable [email protected]:1.service sudo systemctl start [email protected]:1.service systemctl start [email protected]:1.service systemctl status [email protected]:1.service ls -la /tmp ls -la /tmp/.X11-unix rm -rf /tmp/.X11-unix rm -rf /tmp/.XIM-unix ls -la /tmp curl -s checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//' systemctl disable [email protected]:1.service systemctl enabled [email protected]:1.service yum install tigervnc-server -y systemctl daemon-reload systemctl enable [email protected]:1.service systemctl start [email protected]:1.service systemctl start [email protected]:1.service rm -rf /tmp/.X11-unix/* systemctl enable [email protected]:1.service ps -ef | grep vnc ps -ef | grep vnc* ps -ef | grep *vnc* systemctl stop firewalld.service systemctl disable firewalld.service yum install gnome-classic-session gnome-terminal nautilus-open-terminal control-center liberation-mono-fonts unlink /etc/systemd/system/default.target ln -sf /lib/systemd/system/graphical.target /etc/systemd/system/default.target reboot clear service vncserver status locate vncserver yum -y install locate clear ps aux | grep vncserver lsof -i:5901 ps aux | grep vnc vi /etc/sysconfig/iptables-config /sbin/iptables -I INPUT -p tcp --dport 5901 -j ACCEPT /etc/rc.d/init.d/iptables save /etc/init.d/iptables restart iptables-save > /etc/iptables-config iptables-restore < /etc/iptables-config firewall-cmd --zone=public --add-port=5901/tcp --permanent firewall-cmd --reload sudo firewall–cmd—permanent—add–service vnc–server service vncserver restart service vncserver status netstat -an | grep 5901 netstat -an | grep 5900 netstat -an | grep 59* netstat -an | grep 5900 sudo firewall-cmd --permanent --add-service vnc-server lsof -i:5901 lsof -i:5900 service vncserver status service vncserver restart systemctl daemon-reload service vncserver restart systemctl daemon-reload service vncserver status firewall-cmd --permanent --add-service vnc-server systemctl restart firewalld.service systemctl daemon-reload ps -ef | grep vnc systemctl enable [email protected]:1.service systemctl start [email protected]:1.service systemctl status [email protected]:1.service rm -rf /tmp/.X11-unix/ vncserver -kill :1 systemctl start [email protected]:1.service systemctl status [email protected]:1.service -l su - haoop systemctl daemon-reload ps -ef | grep vnc systemctl stop firewalld.service systemctl disable firewalld.service systemctl start [email protected]:1.service systemctl status [email protected]:1.service netstat -anp | grep 5901 service vncserver restart systemctl daemon-reload systemctl enable [email protected]:1.service systemctl start [email protected]:1.service systemctl status [email protected]:1.service rm -rf /tmp/.X11-unix/* systemctl daemon-reload ystemctl start [email protected]:1.service systemctl start [email protected]:1.service systemctl status [email protected]:1.service firewall-cmd --permanent --add-service vnc-server systemctl restart firewalld.service rm -rf /tmp/.X11-unix/ vncserver -kill :1 systemctl start [email protected]:1.service journalc systemctl status [email protected]:1.service service iptables stop netstat -lnt |grep 590* ls /var/log/secure vi /var/log/secure firewall-cmd --state systemctl stop firewalld.service systemctl disable firewalld.service service iptables stop service iptables status systemctl stop firewalld.service systemctl disable firewalld.service vi /etc/sysconfig/vncservers vi/etc/sysconfig/iptables vi /etc/sysconfig/iptables ls /etc/sysconfig/iptables iptables –A INPUT–m state –state NEW –m tcp –p tcp –dport 5901 –j ACCCEPT iptables –A INPUT –m state –state NEW –m tcp –p tcp –dport 5901 –j ACCCEPT iptables -A INPUT -p tcp --dport 80 -j ACCEP iptables -h vi /etc/sysconfig/iptables firewall-cmd --state firewall-cmd --list-all iptables -L -n -v iptables –A INPUT –m state –state NEW –m tcp –p tcp –dport 5901 –j ACCCEPT systemctl stop firewalld.service systemctl disable firewalld systemctl stop firewalld firewall-cmd --version firewall-cmd status firewall-cmd state firewall-cmd --help firewall-cmd --state systemctl status firewalld systemctl disable firewalld systemctl stop firewalld systemctl stop firewalld firewall-cmd --reload virsh vnc display rm -f -R /tmp/.X11-unix/ systemctl enable [email protected]:1.service vncserver ls /home/kvm-bak/vm-images cd /home/kvm-bak/vm-images ls -la rm cent7.qcow2 ls -la cd .. ls -la cp CentOS-7-x86_64-DVD-1708.iso vm-images/ df -lh pwd ls /dev/mapper/centos-home du -sh */home du -sh /home fdisk -l ls -la cd /home/ ls -la mkdir ls /dev mkdir LVM ls -la df -l df -lh cat /etc/sysconfig/network-scripts/ifcfg-em4 cat /etc/sysconfig/network-scripts/ifcfg-br0 ping 192.168.1.201 ping 192.168.1.202 ping 192.168.1.2023 ping 192.168.1.203 ls /var/lib/libvirt/images du -sh /var/lib/libvirt/images du -sh /var/lib/libvirt/ du -sh /var yum --help df l0h df -