.TH CD 1 .SH NAME cd \- change working directory .SH SYNOPSIS .B cd directory .SH DESCRIPTION .I Directory becomes the new working directory. The process must have execute (search) permission in .IR directory . .PP Because a new process is created to execute each command, .I cd would be ineffective if it were written as a normal command. It is therefore recognized and executed by the Shell. .SH "SEE ALSO" sh(1), pwd(1), chdir(2)