Install procps and it will install the other packages you need:

 apt install   procps
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  libgpm2 libncurses6 libprocps7 lsb-base psmisc
Suggested packages:
  gpm
The following NEW packages will be installed:
  libgpm2 libncurses6 libprocps7 lsb-base procps psmisc
0 upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
Need to get 613 kB of archives.
After this operation, 1981 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://deb.debian.org/debian buster/main amd64 libncurses6 amd64 6.1+20181013-2+deb10u2 [102 kB]
Get:2 http://deb.debian.org/debian buster/main amd64 libprocps7 amd64 2:3.3.15-2 [61.7 kB]
Get:3 http://deb.debian.org/debian buster/main amd64 lsb-base all 10.2019051400 [28.4 kB]
Get:4 http://deb.debian.org/debian buster/main amd64 procps amd64 2:3.3.15-2 [259 kB]
Get:5 http://deb.debian.org/debian buster/main amd64 libgpm2 amd64 1.20.7-5 [35.1 kB]
Get:6 http://deb.debian.org/debian buster/main amd64 psmisc amd64 23.2-1+deb10u1 [126 kB]
Fetched 613 kB in 0s (2623 kB/s)
debconf: delaying package configuration, since apt-utils is not installed
Selecting previously unselected package libncurses6:amd64.
(Reading database ... 7118 files and directories currently installed.)
Preparing to unpack .../0-libncurses6_6.1+20181013-2+deb10u2_amd64.deb ...
Unpacking libncurses6:amd64 (6.1+20181013-2+deb10u2) ...
Selecting previously unselected package libprocps7:amd64.
Preparing to unpack .../1-libprocps7_2%3a3.3.15-2_amd64.deb ...
Unpacking libprocps7:amd64 (2:3.3.15-2) ...
Selecting previously unselected package lsb-base.
Preparing to unpack .../2-lsb-base_10.2019051400_all.deb ...
Unpacking lsb-base (10.2019051400) ...
Selecting previously unselected package procps.
Preparing to unpack .../3-procps_2%3a3.3.15-2_amd64.deb ...
Unpacking procps (2:3.3.15-2) ...
Selecting previously unselected package libgpm2:amd64.
Preparing to unpack .../4-libgpm2_1.20.7-5_amd64.deb ...
Unpacking libgpm2:amd64 (1.20.7-5) ...
Selecting previously unselected package psmisc.
Preparing to unpack .../5-psmisc_23.2-1+deb10u1_amd64.deb ...
Unpacking psmisc (23.2-1+deb10u1) ...
Setting up lsb-base (10.2019051400) ...
Setting up libgpm2:amd64 (1.20.7-5) ...
Setting up psmisc (23.2-1+deb10u1) ...
Setting up libprocps7:amd64 (2:3.3.15-2) ...
Setting up libncurses6:amd64 (6.1+20181013-2+deb10u2) ...
Setting up procps (2:3.3.15-2) ...
update-alternatives: using /usr/bin/w.procps to provide /usr/bin/w (w) in auto mode
Processing triggers for libc-bin (2.28-10) ...
 

After this you will find that you have proc, ps, w etc...

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