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在Linux系统中，新加的硬盘需要先挂载后才能读写使用，本文为大家介绍如何在Centos 7中如何挂载和永久性的挂载。
提示：以下是本篇文章正文内容，下面案例可供参考
1. Mount the disc?
Copy the following command to confirm which CDROM file is under the /dev folder in the machine:
[root@localhost /]# ls -l /dev/ | grep -Fi cdrom
You can see that
/dev/cdrom is just a symbolic link to /dev/sr0; here sr0, sg0;
The Linux system can recognize most optical storage devices as SCSI devices, such as /dev/sr0, /dev/sr1, etc. However, if the optical drive uses an old interface, it may be recognized as a PATA device. The /dev/sr* devices are read-only, they are only used to read data from the disc. Readable and writable optical disk drives are represented by device files like /dev/sg0, and g stands for "generic".
Create a new file, we will mount it later, usually created in /mnt
[root@localhost ~]# mkdir /mnt/centos7
[root@localhost mnt]# mount /dev/cdrom /mnt/centos7
mount: /dev/sr0 is write-protected, mounting read-only #提示已挂载
[root@localhost mnt]# df /mnt/centos7 #这里可以看到centos7挂载了/dev/sr0
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sr0 4600876 4600876 0 100% /mnt/centos7
Here you can see if there are any files in the centos7 file
[root@localhost mnt]# ls centos7
CentOS_BuildTag EFI EULA GPL images isolinux LiveOS Packages repodata RPM-GPG-KEY-CentOS-7 RPM-GPG-KEY-CentOS-Testing-7 TRANS.TBL
This method will no longer be mounted after the computer is restarted. You need to manually mount it again to /mnt/centos7 and you will find that the folder is empty.
2. Permanent mount
用/etc/fstab文件配置的方式让系统在开机加载文件系统的时候去挂载光盘。
Backup first.
cp /etc/fstab /etc/fstab_backup
blkid view file system
We remember behind sr0.
Reboot to see if it is mounted.
succeeded
Summarize
提示：这里对文章进行总结：
Simple mounting method, I hope it can help everyone