Make mount folder permanent

NotionCommotion · 11-30-2017, 01:31 PM

I wish to mount a folder. I've done this and it works.

Code:

sudo mkdir /home/jail/home/public/repo
sudo mount --bind /home/michael/public/repo /home/jail/home/public/repo
# And give readonly access
sudo mount -o remount,ro,bind /home/jail/home/public/repo

Now I wish to make it permanent. I look at my /etc/fstab file:

Code:

[michael@virtualServer ~]$ cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Fri Apr  8 14:15:42 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
#
/dev/mapper/centos-root /                       xfs     defaults        1 1
UUID=362355d4-e5da-44de-bf5c-5ce92cf43888 /boot                   xfs     defaults        1 2
/dev/mapper/centos-swap swap                    swap    defaults        0 0
[michael@virtualServer ~]$ ls -l /dev/mapper
total 0
lrwxrwxrwx 1 root root       7 Nov 29 12:31 centos-root -> ../dm-1
lrwxrwxrwx 1 root root       7 Nov 29 12:31 centos-swap -> ../dm-0
crw------- 1 root root 10, 236 Nov 29 12:31 control
[michael@virtualServer ~]$ ls -l /dev/dm*
brw-rw---- 1 root disk 253, 0 Nov 29 12:31 /dev/dm-0
brw-rw---- 1 root disk 253, 1 Nov 29 12:31 /dev/dm-1
[michael@virtualServer ~]$

Okay, I think this is right.
1st column: Device to Mount is /home/michael/public/repo
2nd column: Mount Point is /home/jail/home/public/repo
3rd column: No file system
4th column: mount options are remount,ro,bind
5th column: Don't backup
6th column: fsck shouldn't check.

So, I should do this?

Code:

/home/michael/public/repo   /home/jail/home/public/repo   none   remount,ro,bind   0 0

business_kid · 11-30-2017, 03:38 PM

Have you thought about a line in /etc/fstab? The only snag is /root mounts it, with consequent effects on user perms. Otherwise put the line in the relevant user's ~/.bash_profile or ~/.bashrc

NotionCommotion · 11-30-2017, 06:13 PM

Quote:

Originally Posted by business_kid

Have you thought about a line in /etc/fstab? The only snag is /root mounts it, with consequent effects on user perms. Otherwise put the line in the relevant user's ~/.bash_profile or ~/.bashrc

Yeah, a line in /etc/fstab was the plan. I always get worried when modifying this file and wanted to make sure the line I showed was correct. Also, didn't know if there was a systemd or centos 7 different way to do it.

AwesomeMachine · 12-03-2017, 05:52 PM

I don't know if bind is an option. It might be a switch.

WFV · 12-03-2017, 06:55 PM

for fstab, you should me able to run

Code:

$ cat /etc/mtab

and find the line that you manually mounted the directory in, copy that line into fstab, save and reboot

NotionCommotion · 12-07-2017, 12:30 PM

Quote:

Originally Posted by WFV

for fstab, you should me able to run

Code:

$ cat /etc/mtab

and find the line that you manually mounted the directory in, copy that line into fstab, save and reboot

Thanks, It produced the following.

Thought I'd test it before rebooting, and did a sudo mount -a which didn't seem to complain. Then reboot, but no reply. My fears of fstab were confirmed! Any thoughts? I wasn't sure about some of the options, and that always seems to sting me.

Code:

/dev/mapper/centos-root /home/jail/home/public/repo xfs ro,relatime,attr2,inode64,noquota 0 0

NotionCommotion · 12-07-2017, 12:53 PM

Actually, more than just the options. The device should be /home/michael/public/repo and not /dev/mapper/centos-root.

Rickkkk · 12-08-2017, 12:32 PM

Hey NotionCommotion,

Although it can obviously be done, I'm curious what your objective is in mounting / binding one local /home subdirectory to another local /home subdirectory on the same computer ?

Cheers.

NotionCommotion · 12-08-2017, 12:47 PM

Hi Rickkkkkk, The repo is accessed via ssh by others and I will give them a common username/password, but I don't wish to give them too much access and thus jailed the account and symbolic links are not possible with jailed/chroot users. I "could" locate the content within the jailed user's home, however, this makes maintenance more difficult.

Rickkkk · 12-13-2017, 09:29 AM

Quote:

Originally Posted by NotionCommotion

Hi Rickkkkkk, The repo is accessed via ssh by others and I will give them a common username/password, but I don't wish to give them too much access and thus jailed the account and symbolic links are not possible with jailed/chroot users. I "could" locate the content within the jailed user's home, however, this makes maintenance more difficult.

Got it - thx for the explanation.