Permission Denied on dir when writing as root

[Guest claust]

When trying to touch/mkdir a file/directory, I get a permission denied as root. It is only in the following directories (Have not discovered any other directories). /usr/bin; /sbin. I can write in /usr which the the mount point and /

 

Mount

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/dev/ide/host0/bus0/target0/lun0/part1 on / type ext3 (rw)

none on /proc type proc (rw)

none on /proc/bus/usb type usbfs (rw)

none on /dev type devfs (rw)

none on /dev/pts type devpts (rw,mode=0620)

/dev/ide/host0/bus0/target1/lun0/part1 on /home type ext3 (rw)

none on /mnt/cdrom type supermount (ro,dev=/dev/hdc,fs=udf:iso9660,--,iocharset=iso8859-15)

none on /mnt/floppy type supermount (rw,sync,dev=/dev/fd0,fs=ext2:vfat,--,iocharset=iso8859-15,codepage=850,umask=0)

/dev/ide/host0/bus0/target1/lun0/part5 on /tmp type ext3 (rw)

/dev/ide/host0/bus0/target0/lun0/part6 on /usr type ext3 (rw)

/dev/ide/host0/bus0/target0/lun0/part7 on /var type ext3 (rw)

 

touch

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touch /usr/bin/testingtouch

touch: cannot touch `/usr/bin/testingtouch': Permission denied

 

ls -la /usr/

#######

drwxr-xr-x 2 root root 20480 Sep 28 00:10 bin/

 

any help would be appreciated.

 

Thanks

Claus

[Hirogen2]

Possibilities:

- the immutable flag is set for /usr/bin and everywhere where you cannot write (that's highly unlikely)

- you are using SELinux, and you're not allowed to do everything, despite "id" showing root

- you are not effectively root, i.e. UID=0, but EUID!=0