BASH
bash@localhost ~ $ sudo par
parec             parsetrigrams     partitionmanager  partx             
parecord          parted            partprobe

bash@localhost ~ $ sudo user
useradd  userdel  usermod  users

bash@localhost ~ $ sudo grub-
grub-bios-setup       grub-macbless         grub-mkpasswd-pbkdf2  grub-render-label
grub-editenv          grub-menulst2cfg      grub-mkrelpath        grub-script-check
grub-file             grub-mkconfig         grub-mkrescue         grub-set-default
grub-fstest           grub-mkfont           grub-mkstandalone     grub-sparc64-setup
grub-glue-efi         grub-mkimage          grub-ofpathname       grub-syslinux2cfg
grub-install          grub-mklayout         grub-probe            
grub-kbdcomp          grub-mknetdir         grub-reboot



ZSH
zsh@localhost ~ % sudo par
parec             parecord          parsetrigrams     partitionmanager

zsh@localhost ~ % sudo users

zsh@localhost ~ % sudo grub-
grub-editenv          grub-menulst2cfg      grub-mkpasswd-pbkdf2  grub-script-check   
grub-file             grub-mkfont           grub-mkrelpath        grub-syslinux2cfg   
grub-fstest           grub-mkimage          grub-mkrescue                             
grub-glue-efi         grub-mklayout         grub-mkstandalone                         
grub-kbdcomp          grub-mknetdir         grub-render-label