我有一台 Linux 机器，上面只有非常少的可用命令，例如/bin如下所示：
/bin# ls
ash chattr clockdiff dd dumpkmap fdflush gunzip linux32 ls mktemp mt pidof printenv rmdir setserial su tracepath umount watch
busybox chgrp cp df echo fgrep gzip linux64 lsattr more mv ping ps run-parts sh sync tracepath6 uname zcat
cat chmod cpio dmesg egrep getopt hostname ln mkdir mount netstat ping6 pwd sed sleep tar traceroute6 usleep
catv chown date dnsdomainname false grep kill login mknod mountpoint nice pipe_progress rm setarch stty touch true …