linuxRHEL8安装screen

1、问题

[root@linuxprobe linuxprobe]# screen -S test  ## RHEL8自身不带screen
bash: screen: command not found...
Failed to search for file: Cannot update read-only repo
[root@linuxprobe linuxprobe]# screen --version
bash: screen: command not found...
Failed to search for file: Cannot update read-only repo

2、yum安装

[root@linuxprobe linuxprobe]# yum install screen  ## 没有配置yum仓库
Updating Subscription Management repositories.
Unable to read consumer identity
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Error: There are no enabled repos.

3、配置yum仓库

[root@linuxprobe linuxprobe]# df -h  ## 查看当前挂载情况
Filesystem             Size  Used Avail Use% Mounted on
devtmpfs               969M     0  969M   0% /dev
tmpfs                  984M     0  984M   0% /dev/shm
tmpfs                  984M  9.6M  974M   1% /run
tmpfs                  984M     0  984M   0% /sys/fs/cgroup
/dev/mapper/rhel-root   17G  3.9G   14G  23% /
/dev/sda1             1014M  152M  863M  15% /boot
tmpfs                  197M   20K  197M   1% /run/user/42
tmpfs                  197M  2.3M  195M   2% /run/user/0
/dev/sr0               6.7G  6.7G     0 100% /run/media/root/RHEL-8-0-0-BaseOS-x86_64
[root@linuxprobe linuxprobe]# mkdir -p /media/cdrom  ## 创建光盘挂载点
[root@linuxprobe linuxprobe]# mount /dev/cdrom /media/cdrom/  ## 挂载光盘
mount: /media/cdrom: WARNING: device write-protected, mounted read-only.
[root@linuxprobe linuxprobe]# df -h  ## 查看挂载情况
Filesystem             Size  Used Avail Use% Mounted on
devtmpfs               969M     0  969M   0% /dev
tmpfs                  984M     0  984M   0% /dev/shm
tmpfs                  984M  9.6M  974M   1% /run
tmpfs                  984M     0  984M   0% /sys/fs/cgroup
/dev/mapper/rhel-root   17G  3.9G   14G  23% /
/dev/sda1             1014M  152M  863M  15% /boot
tmpfs                  197M   20K  197M   1% /run/user/42
tmpfs                  197M  2.4M  195M   2% /run/user/0
/dev/sr0               6.7G  6.7G     0 100% /media/cdrom

4、设定光盘挂载为开机自动启动

[root@linuxprobe linuxprobe]# cat /etc/fstab  ## 查看开机自动启动配置文件

#
# /etc/fstab
# Created by anaconda on Thu Oct 29 01:05:13 2020
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
/dev/mapper/rhel-root   /                       xfs     defaults        0 0
UUID=4d9618c5-4252-4910-8e97-d4d28755ed1a /boot                   xfs     defaults        0 0
/dev/mapper/rhel-swap   swap                    swap    defaults        0 0
[root@linuxprobe linuxprobe]# echo -e "/dev/cdrom\t/media/cdrom\tiso9660\tdefaults\t0\t0" >> /etc/fstab  ## 修改开机自动启动配置文件
[root@linuxprobe linuxprobe]# cat /etc/fstab  ## 查看开机自动启动配置文件

#
# /etc/fstab
# Created by anaconda on Thu Oct 29 01:05:13 2020
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
/dev/mapper/rhel-root   /                       xfs     defaults        0 0
UUID=4d9618c5-4252-4910-8e97-d4d28755ed1a /boot                   xfs     defaults        0 0
/dev/mapper/rhel-swap   swap                    swap    defaults        0 0
/dev/cdrom      /media/cdrom    iso9660 defaults        0       0

5、创建yum仓库的配置文件

[root@linuxprobe linuxprobe]# cd /etc/yum.repos.d/
vim rhel8.repo  ##进行编辑，保存退出

[BaseOS]
name=BaseOS
baseurl=file:///media/cdrom/BaseOS
gpgcheck=0
enbaled=1

[AppStream]
name=AppStream
baseurl=file:///media/cdrom/AppStream
gpgcheck=0
enabled=1

6、测试yum仓库

yum install httpd -y

7、安装screen

[root@linuxprobe yum.repos.d]# yum install screen
Updating Subscription Management repositories.
Unable to read consumer identity
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Last metadata expiration check: 0:01:06 ago on Thu 29 Oct 2020 01:21:54 PM CST.
No match for argument: screen
Error: Unable to find a match

8、执行如下命令

yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm -y

9、再次安装screen

yum install screen -y

10、测试screen

[root@linuxprobe yum.repos.d]# screen --version
Screen version 4.06.02 (GNU) 23-Oct-17