topic Re: Can't create file in Operating System - Linux

Can't create file

peterchu — Thu, 27 May 2004 00:39:15 GMT

I have created a directory to the / path (eg ./db ), but can't copy/create file at there , when copy file to there , it pop up "touch: creating `file1': Read-only file system" , could suggest what is wrong in my system ? thx

Re: Can't create file

Alexander M. Ermes — Thu, 27 May 2004 00:50:24 GMT

Hi there.
Did you check the accessrights to that directory ?
Should be at least drw-r--r-- ( 644 ).
If not, use 'chmod 644 directory_name' or
'chmod 755 directory_name'.
755 -> drwxrw-rw-
By the way, pls read the manpages for chmod,
that might give you an idea.
Rgds
Alexander M. Ermes

Re: Can't create file

Shaikh Imran — Thu, 27 May 2004 01:21:42 GMT

Hi,
Please confirm that the filesystem on which you are creating the directory is mounted with read-only or read-write access.
You can do this by
#cat /etc/fstab
If it's NFS filesystem check whether its exported as read-only from the NFS server.
You can do this by
#exportfs
command

Regards

Re: Can't create file

Jeroen Peereboom — Thu, 27 May 2004 01:48:31 GMT

Peter,

you created the directory. That went right, so at that time the filesystem was not read-only. But now it apparantly is. What did you do after creating the directory? Reboot the system? Mount a filesystem on /db?
First cd to the directory and type 'df .' This will tell you which filesystem it belongs to. Next check (in /etc/fstab) if the filesystem is mounted read-write in /etc/fstab. And tell us the results...

JP.

Re: Can't create file

peterchu — Thu, 27 May 2004 02:28:10 GMT

[root@edp/]# cat /etc/fstab
LABEL=/ / ext3 defaults 1 1
LABEL=/boot /boot ext2 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
none /proc proc defaults 0 0
none /dev/shm tmpfs defaults 0 0
LABEL=/tmp /tmp ext3 defaults 1 2
LABEL=/usr /usr ext3 defaults 1 2
LABEL=/var /var ext3 defaults 1 2
/dev/sda9 swap swap defaults 0 0

is it a read-only system ? thx

Re: Can't create file

peterchu — Thu, 27 May 2004 02:35:41 GMT

thx reply , i tried to login as "root" to chmod the directory , it also pop "chmod: changing permissions of `/db': Read-only file system , and I also can't create file as "root" user , what is the problem in my setting ? thx.

Re: Can't create file

Roberto Polli — Thu, 27 May 2004 04:46:07 GMT

send your

df -h

peace, R.

Re: Can't create file

Mark Grant — Thu, 27 May 2004 05:32:24 GMT

This is unlikely but it is possible that you have not quite booted in the way you think.

You could try the following

mount -o remount,rw /

Though you might have to replace the "/" with the device for the root filesystem

If that works and you can then create your file I would start to suspect your boot process and we can look at that.

Re: Can't create file

Kiyoshi Miyake — Fri, 28 May 2004 03:19:18 GMT

Hi,

mount command shows the status of each mounted file system.

e.g.)

# mount | grep /boot
/dev/hda5 on /boot type ext2 (rw)
# mount -o remount,ro /boot
# mount | grep /boot
/dev/hda5 on /boot type ext2 (ro)
# mount -o remount,rw /boot
# mount | grep /boot
/dev/hda5 on /boot type ext2 (rw)
#

"(rw)" means read & write.
"(ro)" means read only.

What shows mount command on your box?

Perhaps, you have mounted /db with read only option.
Is /db mounted disk? or just directory on / disk?

thanks.