===== pathname expansion =====
1 pathexp/unreadable/file
2 pathexp/unreadable/file
3 pathexp/unreadable/file
4 pathexp/unreadable/file
5 pathexp/un*able/f*le
6 pathexp/unreadable/f*le
7 pathexp/un*able/file
8 pathexp/un*able/f*le
9 pathexp/unreadable/f*le
===== cd builtin =====
cd $HOME
cd $OLDPWD
cd $PWD
cd -P
cd -L
cd -L default
cd $CDPATH 1
cd $CDPATH 2
cd canonicalization /dev
===== umask builtin =====
u=,g=,o=
ok
===== hash builtin =====
