Unable to create directory in ubuntu 10.04

Question

When i try to run

mkdir new

I get the error,

 bash: cd: new: No such file or directory

As far as i remember, i haven't changed any file permissions.So what could be the reason for this. Ubuntu 10.04

Update:

$ whereis mkdir

mkdir: /bin/mkdir /usr/share/man/man1/mkdir.1.gz /usr/share/man/man2/mkdir.2.gz

$ whereis cd

cd:

o/p for ls -la

total 68
drwxr-xr-x 13 comp comp  4096 2011-06-15 20:01 .
drwxr-xr-x 43 comp comp  4096 2012-04-02 16:09 ..
drwxr-xr-x  6 comp comp  4096 2011-06-15 20:01 app
drwxr-xr-x  5 comp comp  4096 2011-06-15 20:01 config
drwxr-xr-x  2 comp comp  4096 2011-06-15 20:01 db
drwxr-xr-x  2 comp comp  4096 2011-06-15 20:01 doc
drwxr-xr-x  3 comp comp  4096 2011-06-15 20:01 lib
drwxr-xr-x  2 comp comp  4096 2011-06-15 20:01 log
drwxr-xr-x  5 comp comp  4096 2011-06-15 20:01 public
-rw-r--r--  1 comp comp   307 2011-06-15 20:01 Rakefile
-rw-r--r--  1 comp comp 10011 2011-06-15 20:01 README
drwxr-xr-x  3 comp comp  4096 2011-06-15 20:01 script
drwxr-xr-x  7 comp comp  4096 2011-06-15 20:01 test
drwxr-xr-x  6 comp comp  4096 2011-06-15 20:01 tmp
drwxr-xr-x  3 comp comp  4096 2011-06-15 20:01 vendor

Answer 1

remove this line 'alias mkdir=cd' from ~/.bashrc or /etc/bash.bashrc