1.查看系统信息
[root@CJtest network-scripts]# cat /etc/centos-release
CentOS Linux release 8.1.1911 (Core)
[root@CJtest network-scripts]#
[root@CJtest network-scripts]# lsb_release -a
LSB Version: :core-4.1-amd64:core-4.1-noarch
Distributor ID: CentOS
Description: CentOS Linux release 8.1.1911 (Core)
Release: 8.1.1911
Codename: Core
[root@CJtest network-scripts]#
2.查看硬盘，网卡
[root@CJtest network-scripts]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 50G 0 disk
├─sda1 8:1 0 512M 0 part /boot
├─sda2 8:2 0 32G 0 part
│ ├─cl-root 253:0 0 30G 0 lvm /
│ └─cl-swap 253:1 0 2G 0 lvm [SWAP]
└─sda3 8:3 0 17.5G 0 part
└─data-data 253:2 0 17.5G 0 lvm /data
sr0 11:0 1 7G 0 rom
[root@CJtest network-scripts]# mii-tool ens33
ens33: negotiated 1000baseT-FD flow-control, link ok
[root@CJtest network-scripts]#
3.查看shell
[root@CJtest ~]# cat /etc/shells
/bin/sh
/bin/bash
/usr/bin/sh
/usr/bin/bash
查看当前使用的shell
[root@CJtest ~]# echo $SHELL
/bin/bash
[root@CJtest ~]# ls -l
total 8
-rw-------. 1 root root 1657 Apr 20 2020 anaconda-ks.cfg
-rw-r--r--. 1 root root 1982 Apr 20 2020 initial-setup-ks.cfg
[root@CJtest ~]# > test
[root@CJtest ~]# ls -l
total 8
-rw-------. 1 root root 1657 Apr 20 2020 anaconda-ks.cfg
-rw-r--r--. 1 root root 1982 Apr 20 2020 initial-setup-ks.cfg
-rw-r--r--. 1 root root 0 Apr 20 04:24 test
[root@CJtest ~]#
4.更改PS1格式
[root@CJtest ~]# echo $PS1
[\u@\h \W]\$
[root@CJtest ~]#
For example:
PS1="\[\e[1;5;41;33m\][\u@\h \W]\$\[\e[0m\]"
利用nano编辑文件，把PS1保存在/etc/profile.d下
[root@CJtest ~]$nano env.sh
5.修改登录系统后的提示信息
[root@CJtest ~]$cat /etc/motd
[root@CJtest ~]$nano /etc/motd
[chaijing@CJtest ~]$cat /etc/motd
ようこそ！
[chaijing@CJtest ~]$
ChaideMacBook-Air:~ chaijing$ ssh chaijing@192.168.1.249
chaijing@192.168.1.249's password:
ようこそ！
Activate the web console with: systemctl enable --now cockpit.socket
Last login: Mon Apr 20 03:45:14 2020 from 192.168.1.233
[chaijing@CJtest ~]$
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