Usefull ESX commands

df -h  lists the filesystems and space available.
perl -spi -e 's|PermitRootLogin no|PermitRootLogin yes|' /etc/ssh/sshd_config enables SSH for root, need to issue service sshd restart afterwards
vimsh -n -e /hostsvc/maintenance_mode_enter or _exi enter mainenance mode from the shell
vmkfstools -Ph -v 10 /vmfs/volumes/$$volume_label$$/ Check free file space as VMFS can only support 32k files
dd if=/dev/cdrom of="isoname.iso" makes an ISO from the CD-ROM in the host.
mkdir iso | chmod 777 iso Makes a directory called iso and sets permissions to read write.