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Filesystem                   Size  Used Avail Use% Mounted on
tmpfs                        380M  8.5M  371M   3% /run
efivarfs                      72K   21K   47K  31% /sys/firmware/efi/efivars
/dev/sdb1                    2.8G  2.8G     0 100% /cdrom
/cow                         1.9G  974M  924M  52% /
/dev/disk/by-label/writable   12G  908K   12G   1% /var/log
tmpfs                        1.9G     0  1.9G   0% /dev/shm
tmpfs                        5.0M   12K  5.0M   1% /run/lock
tmpfs                        1.9G  4.0K  1.9G   1% /tmp
tmpfs                        380M  220K  380M   1% /run/user/1000