Linux中挂载命令

一 查询与自动挂载

mount

查询系统中已经挂载的设备

mount -a

依据配置文件/etc/fatab的内容，自动挂载

 

二 实战

[root@localhost ~]# mount

sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime,seclabel)

proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)

devtmpfs on /dev type devtmpfs (rw,nosuid,seclabel,size=494100k,nr_inodes=123525,mode=755)

securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)

tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,seclabel)

devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,seclabel,gid=5,mode=620,ptmxmode=000)

tmpfs on /run type tmpfs (rw,nosuid,nodev,seclabel,mode=755)

tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,seclabel,mode=755)

cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)

pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)

cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)

cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)

cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)

cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)

cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu)

cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)

cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)

cgroup on /sys/fs/cgroup/net_cls type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls)

cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)

configfs on /sys/kernel/config type configfs (rw,relatime)

/dev/sda3 on / type xfs (rw,relatime,seclabel,attr2,inode64,noquota)

/dev/sda5 on /usr type xfs (rw,relatime,seclabel,attr2,inode64,noquota)

selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)

systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=29,pgrp=1,timeout=300,minproto=5,maxproto=5,direct)

debugfs on /sys/kernel/debug type debugfs (rw,relatime)

mqueue on /dev/mqueue type mqueue (rw,relatime,seclabel)

hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,seclabel)

nfsd on /proc/fs/nfsd type nfsd (rw,relatime)

/dev/sda7 on /mydata type xfs (rw,relatime,seclabel,attr2,inode64,noquota)

/dev/sda2 on /var type xfs (rw,relatime,seclabel,attr2,inode64,noquota)

sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)

/dev/sda1 on /boot type xfs (rw,relatime,seclabel,attr2,inode64,noquota)

tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,seclabel,size=101688k,mode=700)

[root@localhost ~]# cat /etc/fstab

 

#

# /etc/fstab

# Created by anaconda on Wed Oct 26 22:38:33 2016

#

# 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

#

UUID=7cd0e1c5-af95-4c66-a583-e7c0acd07ae7 / xfs defaults 0 0

UUID=a8da90cd-5ae5-4bdd-bdcf-389791fb52ab /boot xfs defaults 0 0

UUID=f19d115c-d8fd-4cdc-ba8c-bb9a6dc81383 /mydata xfs defaults 0 0

UUID=bd582cea-8cd3-45b6-87d0-5fcdb75202e2 /usr xfs defaults 0 0

UUID=c173cef0-b9f0-4758-ae54-73adbd162d93 /var xfs defaults 0 0

UUID=b2959ca7-662b-486a-92fd-c83982f27400 swap swap defaults 0 0

[root@localhost ~]# mount -a

 

三 挂载命令格式

mount [-t 文件系统] [-o 特殊选项] 设备文件名 挂载点

选项：

-t 文件系统：加入文件系统类型来指定挂载的类型，可以ext3、ext4、iso9660等文件系统

-o 特殊选项：可以指定挂载的额外选项。

 

四 特殊文件选项

 

 

五 特殊文件选项实战

[root@localhost home]# cp hello.sh /mydata/hello.sh

[root@localhost home]# cd /mydata

[root@localhost mydata]#

[root@localhost mydata]#

[root@localhost mydata]#

[root@localhost mydata]# ls

hello.sh

[root@localhost mydata]# ./hello.sh

Hello

[root@localhost mydata]# mount -o remount,noexec /mydata/

[root@localhost mydata]# ./hello.sh

-bash: ./hello. sh: Permission denied

[root@localhost mydata]# whoami

root

[root@localhost mydata]# mount -o remount,exec /mydata/

[root@localhost mydata]# ./hello.sh

Hello

 

六 挂载光盘

1、建立挂载点

mkdir /mnt/cdrom

2、挂载光盘

mount -t iso9660 /dev/cdrom /mnt/cdrom

mount /dev/sr0 /mnt/cdrom

 

七 挂载光盘实战

[root@localhost dev]# cd /media/

[root@localhost media]#

[root@localhost media]# mount -t iso9660 /dev/sr0 /media

mount: /dev/sr0 is write-protected, mounting read-only

[root@localhost media]# ll /dev/cdrom

lrwxrwxrwx. 1 root root 3 Jul 15 10:57 /dev/cdrom -> sr0

[root@localhost media]# ls /media/

CentOS_BuildTag EULA images LiveOS repodata RPM-GPG-KEY-CentOS-Testing-7

EFI GPL isolinux Packages RPM-GPG-KEY-CentOS-7 TRANS.TBL

 

八 卸载光盘命令

unmount 设备文件名或挂载点

 

九 卸载光盘实战

[root@localhost media]# umount /media

[root@localhost media]# ll

total 0

 

十 挂载U盘