# vim /etc/hosts

Add the following:

......
<Redhat Satellite IP address> <Redhat Satellite Server FQDN>

Step Two: Install katello-ca-consumer-latest.noarch.rpm
2.1 Download katello-ca-consumer-latest.noarch.rpm

# curl --insecure --output katello-ca-consumer-latest.noarch.rpm https://<Redhat/ Satellite Server FQDN>/pub/katello-ca-consumer-latest.noarch.rpm

2.2 Install katello-ca-consumer-latest.noarch.rpm

# yum -y localinstall katello-ca-consumer-latest.noarch.rpm

Step Three: Register to Red Hat Satellite Server

# subscription-manager register --org="<organization>" --activationkey="<activation key>"

Step Four: Install katello-host-tools, katello-host-tools-tracer and katello-agent
4.1 Enable rhel-*-satellite-tools-*-rpms repo or satellite-tools-*-rhel-*-rpms
4.1.1 For RHEL 7

# subscription-manager repos --enable=rhel-\*-satellite-tools-\*-rpms

4.1.2 For RHEL 8

# subscription-manager repos --enable=satellite-tools-\*-rhel-\*-rpms
# subscription-manager repos --disable=satellite-tools-\*-rhel-\*-eus-rpms

4.2 Install katello-host-tools, katello-host-tools-tracer and katello-agent

# yum -y install katello-host-tools; yum -y install katello-host-tools-tracer; yum -y install katello-agent

Step Five: Check
5.1 Check registration information

# subscription-manager identity

5.2 Check license

# subscription-manager list --consumed

Content One: Set default values for variables on command Line
1.1 Assign Values to Ordinary Variables

# a=1
# b=

（Add: let a be 1 and B be null as an example）

1.2 Set default values for variables on command Line

# var1=${a:-no}
# var2=${b:-no}

（
Add：
If a is null, var1 is no, otherwise var1 is equal to a
If B is null, var2 is no, otherwise var2 is equal to B
）

1.3 View variable results

# echo $var1
1
# echo $var2
no

（
Add：
The value of a is 1, so var1 is 1
The B is null, so var2 is no
）

Content Two：Set variable defaults in script
2.1 Setting variable defaults in scripts

# vim var_default.sh
Create the following：
#!/bin/bash
var_default="${1:-no}"
echo $var_default

（Add：If the variable of $1 is null, then var_default is no, otherwise var_default is equal to $1, and print it out as an example）

2.2 Test variable defaults in scripts

# bash var_default.sh
no
# bash var_default.sh 1
1
# bash var_default.sh 2
2
# bash var_default.sh 3
3

Content One: BIOS Partition Advice
1.1 Partition Planning

/boot    >= 5G
/var/tmp >= 10G
/tmp     >= 10G
swap     >= 2G
/        all remaining space

1.2 Standard Partition and Logical Partition

/boot    Use standard partition
/var/tmp Use logical partition
/tmp     Use logical partition
swap     Use logical partition
/        Use logical partition

1.3 Format

/boot    xfs
/var/tmp xfs
/tmp     xfs
swap     swap
/        xfs

1.4 Mount Parameter

/boot    defaults
/var/tmp rw,nosuid,nodev,noexec,relatime,strictatime
/tmp     rw,nosuid,nodev,noexec,relatime,strictatime
swap     defaults
/        defaults

Content Two：EFI Partition Advice
2.1 Partition Planning

/boot/efi >= 5G
/var/tmp  >= 10G
/tmp      >= 10G
swap      >= 2G
/         all remaining space

2.2 Standard Partition and Logical Partition

/boot/efi Use standard partition
/var/tmp  Use logical partition
/tmp      Use logical partition
swap      Use logical partition
/         Use logical partition

2.3 Format

/boot/efi vfat
/var/tmp  xfs
/tmp      xfs
swap      swap
/         xfs

2.4 Mount Parameter

/boot/efi defaults
/var/tmp  rw,nosuid,nodev,noexec,relatime,strictatime
/tmp      rw,nosuid,nodev,noexec,relatime,strictatime
swap      defaults
/         defaults

Author: Mingyu Zhu
Name: view the process using swap
Function: view the process using swap

Usage:
1. Add execution permission to this script
2. Execute the script

Script:

#!/bin/bash

i=1

while [ $i -le 100 ]
do free -m
        sleep 15
        let i=i+1
done

读史使人明智，读诗使人灵秀，数学使人周密，科学使人深刻，伦理学使人庄重，逻辑修辞之学使人善辩；凡有所学，皆成性格。

人类的生命，不能以时间长短来衡量，心中充满爱时，刹那即永恒！——真的是不能以时间长短加以衡量。

重要的不是知识的数量，而是知识的质量，有些人知道很多很多，但却不知道最有用的东西。

有智慧的人自己选择方向。

我通过哲学了解了这一点：我行事是出于自觉，他人行事只是因为害怕法律。

授人以鱼，不如授人以渔。

大多数思想家写得拙劣，因为他们不仅要传达自己的思想，而且要传达思考的过程。