root@nasi:/var/chroot/pbuilder# du
2545896	.
root@nasi:/var/chroot/pbuilder# ls -la
total 2.5G
drwxr-xr-x 1 root root  750 aug  3 18:16 ./
drwxr-xr-x 1 root root   22 sep 16  2017 ../
-rw-r--r-- 1 root root 121M aug  3 18:00 base_artful-amd64.tgz
-rw-r--r-- 1 root root 122M aug  3 18:01 base_artful-i386.tgz
-rw-r--r-- 1 root root 124M aug  3 18:02 base_bionic-amd64.tgz
-rw-r--r-- 1 root root 124M aug  3 18:03 base_bionic-i386.tgz
-rw-r--r-- 1 root root 141M aug  3 18:04 base_jessie-amd64.tgz
-rw-r--r-- 1 root root 147M aug  3 18:05 base_jessie-i386.tgz
-rw-r--r-- 1 root root 136M aug  3 18:06 base_stretch-amd64.tgz
-rw-r--r-- 1 root root 142M aug  3 18:07 base_stretch-i386.tgz
-rw-r--r-- 1 root root 255M aug  3 18:09 base_testing-amd64.tgz
-rw-r--r-- 1 root root 262M aug  3 18:12 base_testing-i386.tgz
-rw-r--r-- 1 root root 105M aug  3 18:12 base_trusty-amd64.tgz
-rw-r--r-- 1 root root 102M aug  3 18:13 base_trusty-i386.tgz
-rw-r--r-- 1 root root 106M aug  3 18:14 base_wheezy-amd64.tgz
-rw-r--r-- 1 root root 109M aug  3 18:14 base_wheezy-i386.tgz
-rw-r--r-- 1 root root 130M aug  3 18:15 base_xenial-amd64.tgz
-rw-r--r-- 1 root root 130M aug  3 18:16 base_xenial-i386.tgz
-rw-r--r-- 1 root root 120M dec  1  2017 base_yakkety-amd64.tgz
-rw-r--r-- 1 root root 120M dec  1  2017 base_yakkety-i386.tgz