sudo ls /
MacBook-Pro-de-toto:~ toto$ sudo ls /
sudo: /etc/sudoers is owned by uid 1, should be 0
sudo: no valid sudoers sources found, quitting
sudo: unable to initialize policy plugin
MacBook-Pro-de-toto:~ toto$
diskutil list
MacBook-Pro-de-maena-869:~ Maena$ diskutil list
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_HFS Macintosh HD 999.9 GB disk0s2
/dev/disk1 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *525.1 GB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_HFS MacinExt 524.8 GB disk1s2
/dev/disk2 (external, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_HFS DataRes 499.2 GB disk2s2
3: Apple_Boot Recovery HD 650.0 MB disk2s3
MacBook-Pro-de-maena-869:~ Maena$
diskutil eraseVolume jhfs+ "Macintosh HD" disk0s2