- bc
- test
- look
- netstat
- uptime
- vi
- expr
- hostname
- domainname
- ssh-agent
- rpm
- ssh-copy-id
- apt-cache
- who
- top
- cron
- crontab
- nslookup
- whoami
- xargs
- uname -a
- updatedb
- free
- killall
- su
- halt
- whereis
- logout
- reboot
- cmp
- ifup
- ifdown
- w
- users
- service
- pkill
- pmap
- sftp
- md5sum
- fdisk
- htpasswd
- ssh-add
- for
- snmpwalk
- update-rc.d
- env
htop, vmstat, snort, httpie, rest etc.
easy_install, virtualenv, composer, ruby, rustc, cargo, go, java, javac, javac, elixir, rvm, nvm, chgrp, etc.
Some may be really helpful:
rails, zf, symfony etc,
gulp, grunt, webpack, babel, doctrine, rake, make, ant, mvn, bundle etc.
docker, vagrant, ansible, puppet, chef, consul, serf, aws, nginx, as-describe-auto-scaling-groups, otto etc.