one-click-shell

run once, get everything

Networking

modify the default network card name starting from eth0

sed -Ei 's/^(GRUB_CMDLINE_LINUX=".*)"/\1 net.ifnames=0"/' /etc/default/grub
grub2-mkconfig -o /boot/grub2/grub.cfg || grub-mkconfig -o /boot/grub/grub.cfg
reboot

view the system's default network service

systemctl list-units --type=service | grep -P "NetworkManager|networkd|networking"

NetworkManager.service

# yum install -y NetworkManager || yum install -y network-manager
# sed -i '/^\[ifupdown\]/,/^\[/{s/^managed=.*/managed=true/}' /etc/NetworkManager/NetworkManager.conf
nmcli con add type ethernet ifname eth0 con-name con-eth0 ip4 10.0.0.100/24 gw4 10.0.0.254 ipv4.dns 223.5.5.5
nmci con mod con-eth0 +ipv4.routes "20.0.0.0/24 10.0.0.254"
nmcli con up con-eth0

systemd-networkd.service

cat > "/etc/netplan/00-eth0.conf" << EOF
network:
  ethernets:
    eth0:
      addresses:
        - "10.0.0.1/24"
      routes:
        - to: default
          via: 10.0.0.254
      nameservers:
        search: [hsieh.com] 
        addresses: [223.5.5.5,223.6.6.6]  
EOF

netplan apply

networking.service

# apt install -y ifupdown resolvconf
ifdown ens33
cat > "/etc/network/interfaces.d/eth0.cfg" <<EOF
auto eth0
# iface eth0 inet auto
iface eth0 inet static
  address 10.0.0.100
  netmask 255.255.255.0
  gateway 10.0.0.254
  dns-nameservers 223.5.5.5
EOF
ifup eth0

bond

nmcli dev
nmcli con add type bond ifname bond0 con-name con-bond0 mode active-backup ip4 10.0.0.100/24 gw4 10.0.0.254
nmcli con add type bond-slave  ifname eth1 con-name bond0-slave-eth1 master bond0
nmcli con add type bond-slave  ifname eth2 con-name bond0-slave-eth1 master bond0
nmcli con reload

bridge

# yum install -y bridge-utils
brctl addbr br0
brctl addif br0 eth1
brctl show

Time

timezone

date -R
systemctl set-timezone Asia/Shanghai
systemctl status
clock -w

chrony

# SERVER
# yum install -y chrony
systemctl enable --now chronyd
vim /etc/chrony.conf
  server ntp.aliyun.com iburst
  allow 0.0.0.0/0
  local startum 10
systemctl restart chronyd
# chronyc makestep
chronyc sources -v

Package Management

YUM

yum install -y yum-utils createrepo
# yum downgrade -y gcc glibc
reposync --repoid=epel -p /var/www/html/centos/x86_64/
createrepo --workers=$(grep -c processor /proc/cpuinfo) --update /var/www/html/centos/x86_64/epel/

Remote Login

ssh-keygen -t rsa -N "" -f ~/.ssh/id_rsa
ssh-copy-id 127.0.0.1
scp -o StrictHostKeyChecking=no -r .ssh 30.0.0.1: