'[' cal env jq nawk rmdir tsort adu cat ex jsh newgrp sed tty awk chgrp expand kill nice seq umount basename chmod expr ksh nl setsid uname bash chown false ldconfig nohup sh uncompress bash+ cksum file link oawk sleep unexpand bash1 cmp find ln od sort uniq bash2 comm fold locale paste split unlink bash3 compress fuser localedef patch strace uudecode bash32 cp gawk logger pathchk strings uuencode bash4 csplit gencat logname pax stty wc bash42 cut getconf ls pr tabs which bash43 dash getent m4 printf tac who bash44 date grep mawk ps tail xargs bash5 dd gunzip mkdir pwd tee yes bash50 df gzip mkfifo readlink test zcat bash51 diff head mknod realpath time bash52 dirname hostname mksh recode touch bash53 du iconv mktemp renice tput bc echo id mount rev tr bsh ed join mv rm true