I was using MountManager in Ubuntu 12.04 to set user permissions in mounting hard drives. I set each partititon to be mountable by everyone instead of admin only. Then I clicked Apply in the file menu and it gave me the message successfully updated.

Upon restarting Ubuntu, just hangs on the splash screen and does not boot any further. Windows still boots fine.

How can I fix these? please help

thanks

From LiveUSB:

my fstab looks like:

overlayfs / overlayfs rw 0 0
tmpfs /tmp tmpfs nosuid,nodev 0 0
/dev/sda5 swap swap defaults 0 0
/dev/sda7 swap swap defaults 0 0

Is this corrupted?

Other things that may be helpful:

blkid returns

/dev/loop0: TYPE="squashfs" 
/dev/sda1: LABEL="System Reserved" UUID="0AF26C31F26C22E5" TYPE="ntfs" 
/dev/sda2: UUID="5E1C88E31C88B813" TYPE="ntfs" 
/dev/sda3: UUID="94B2BB7DB2BB6282" TYPE="ntfs" 
/dev/sda5: UUID="41b66b9a-2b48-45cf-b59d-cd50e41ec971" TYPE="swap" 
/dev/sda6: UUID="c73ca79e-4fa4-4bde-967e-670593736f6a" TYPE="ext4" 
/dev/sda7: UUID="c05d659f-103c-4444-9dc4-3121b9e081d6" TYPE="swap" 
/dev/sdb1: LABEL="PENDRIVE" UUID="1DE8-0A49" TYPE="vfat" 

and cat /proc/mounts

rootfs / rootfs rw 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
udev /dev devtmpfs rw,relatime,size=1950000k,nr_inodes=206759,mode=755 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /run tmpfs rw,nosuid,relatime,size=783056k,mode=755 0 0
/dev/sdb1 /cdrom vfat           rw,relatime,fmask=0022,dmask=0022,codepage=cp437,iocharset=iso8859-1,shortname=mixed,erro     rs=remount-ro 0 0
/dev/loop0 /rofs squashfs ro,noatime 0 0
tmpfs /cow tmpfs rw,noatime,mode=755 0 0
/cow / overlayfs rw,relatime,lowerdir=//filesystem.squashfs,upperdir=/cow 0 0
none /sys/fs/fuse/connections fusectl rw,relatime 0 0
none /sys/kernel/debug debugfs rw,relatime 0 0
none /sys/kernel/security securityfs rw,relatime 0 0
tmpfs /tmp tmpfs rw,nosuid,nodev,relatime 0 0
none /run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k 0 0
none /run/shm tmpfs rw,nosuid,nodev,relatime 0 0
gvfs-fuse-daemon /home/ubuntu/.gvfs fuse.gvfs-fuse-daemon      rw,nosuid,nodev,relatime,user_id=999,group_id=999 0 0