[erlkonig]

No, this is pretty meaningless unless sourcing in function.sh or something. If your script is short lived and doesn't have a work area (read/writing files), don't bother with cd. If it's long lived, the best default would be "cd /" or "cd /tmp" - sadly, since bash seem to mmap the script, this still doesn't free up the filesystem for unmounting. Python is different, and "cd /" is a good default for a long-lived program.