Creating the passwd, group and log files

/etc/passwd

cat > /etc/passwd << "EOF"

root:x:0:0:root:/root:/bin/bash

EOF

/etc/group

cat > /etc/group << "EOF"

root:x:0:

bin:x:1:

sys:x:2:

kmem:x:3:

tty:x:4:

tape:x:5:

daemon:x:6:

floppy:x:7:

disk:x:8:

lp:x:9:

dialout:x:10:

audio:x:11:

EOF

exec /tools/bin/bash --login +h

Initialize log files

touch /var/run/utmp /var/log/{btmp,lastlog,wtmp}

chmod 644 /var/run/utmp /var/log/{btmp,lastlog,wtmp}