rename "/tmp/old", "/tmp/new" | 
Renombra un fichero existente | 
 
unlink "one", "two", "three" | 
Similar a rm one two three | 
 
link "one", "two" | 
Similar a ln one two | 
 
symlink "one", "two" | 
Similar a ln -s one two | 
 
mkdir "one" | 
Equivalente a mkdir one | 
 
rmdir "one" | 
Suprime el directorio one | 
 
chmod 0755, "one", "two" | 
Cambia los permisos | 
 
chown $uid, $gid, glob "*.o" | 
Cambia propietario y grupo | 
 
getpwnam "casiano" | 
devuelve el uid del usuario casiano | 
 
getgrnam "users" | 
devuelve el gid del grupo users | 
 
 
 
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