pmap, which shows the memory mappings for a particular process. It is just a formatted version of what you can find in
/proc/PID/maps, but still nice to have. Knowing the mappings in a particular process is often useful for debugging purposes.
remove-shell, that respectively add and remove a shell from
/etc/shells. This file lists the shells that are acceptable for the
chshcommand, for example.
nanddump, that respectively write to NAND with bad block management, and dumps NAND flash contents. Those two commands expand the set of MTD-related commands in Busybox and are replacements for the version available in
mtd-utils. There were already other MTD related utilities in Busybox:
flashcp(write to a NOR flash),
flash_eraseall(erase a NOR or NAND flash),
flash_unlockto protect/unprotect sectors on flash storage. The main advantage is that these utilities relieve you from having to cross-compile
mtd-utils, which is never as simple as cross-compiling BusyBox.
base64, a base64 encoder and decoder.
powertop, three new statistics programs.
mpstat(as in multiprocessor stat) reports interrupts and CPU usage on multiprocessor systems, on a per-CPU basis.
iostatreports CPU and block device statistics.
powertopis a lightweight variant of the popular tool used to diagnose sources of wake-ups, but is only limited to Intel-based machines at the moment.
nbd-client, a client for the Network Block Device protocol, so that an embedded system can mount volumes shared by NBD
blockdev, allows to perform some
ioctl()on block devices such as get sector size, get/set block size, flush buffers, etc.
Have fun with Busybox!