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Old 05-16-2012, 11:33 AM   #1
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Registered: May 2012
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Error Read-only file system


Every time I try to save a index.php file I get the following error..

[ Error writing /var/www/index.php: Read-only file system ]

Any help would be greatly appreciated.
Old 05-16-2012, 11:59 AM   #2
Registered: Apr 2007
Distribution: Ubuntu
Posts: 105

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The filesystem that file is stored on is mounted read-only, which means you won't be able to modify anything on it. Pasting output of the mount command would be helpful.

If this used to work but now doesn't, then perhaps the disk is having problems. Sometimes if errors are detected on a disk, Linux will mount the filesystem read-only.
Old 05-16-2012, 12:07 PM   #3
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I typed "mount" at the terminal and the following output..

/dev/sda1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode=0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode=0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
none on /var/lib/ureadahead/debugfs type debugfs (rw,relatime)
/dev/sda6 on /DATA type ext4 (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)

mount: warning: /etc/mtab is not writable (e.g. read-only filesystem).
       It's possible that information reported by mount(8) is not
       up to date. For actual information about system mount points
       check the /proc/mounts file.
Old 05-16-2012, 12:48 PM   #4
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Thanks for your help :]

You were correct about the damaged filesystem causing a read-only error.

I decided to do a e2fsck -p -f, a few blocks were off and did a reboot and everything is okay now.


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