What would I do with a new CentOS server

add my own user

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adduser USERNAME
passwd USERNAME

add user to sudoers

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vim /etc/sudoers

add USERNAME ALL=(ALL) ALL just belowroot ALL=(ALL) ALL

switch user

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su USERNAME

(if you’re in China) change the source

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mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum makecache

install build essencials

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sudo yum -y groupinstall "Development Tools" # -y means 'yes'

install zsh and oh-my-zsh

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sudo yum -y install zsh
sh -c "$(curl -fsSL https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"

in case drop out

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vim /etc/ssh/sshd_config

find lines below:

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ClientAliveInterval 0
ClientAliveCountMax 3

uncomment and change:

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ClientAliveInterval 30
ClientAliveCountMax 86400

and restart the service:

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service sshd restart

install nvm

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curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.6/install.sh | bash
nvm install --lts
npm install -g yarn

install global node modules

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yarn global add vue-cli @angular/cli typescript http-server gulp webpack

in China, you may change the source into Taobao’s

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yarn config set registry https://registry.npm.taobao.org

when switch to other sh, I would

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vim ~/.bashrc

in vim, add

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export PATH=/home/dmf/.yarn/bin:$PATH

In case grub is down, and start with gurb rescue,

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grub rescue>ls

for each listed below, try ls it.
for example, ls (hd0, msdos3) or ls (hd0, gpt5), until the output is not filesystem error

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grub rescue >root=(hdx,msdosx)
grub rescue >prefix=(hdx,msdosx)/boot/grub
grub rescue >insmod normal
grub rescue >normal

then restart the computer
in terminal input

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sudo grub-install /dev/sda
sudo grub-mkconfig -o /boot/grub/grub.cfg
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               `+oooooo:
               -+oooooo+:
             `/:-:++oooo+:
            `/++++/+++++++:
           `/++++++++++++++:
          `/+++ooooooooooooo/`
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  `+sso+:-`                 `.-/+oso:
 `++:.                           `-/+/
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