| Information | RHEL Pre 7.0 | Ubuntu Pre 15.04 | Systemd Based |
|---|---|---|---|
| Date/Time | date | date | date |
| Hostname (FQDN) | hostname -f | hostname -f | hostname -f |
| IP Address | ip addr | ip addr | ip addr |
| Routing | ip route | ip route | ip route |
| Logged in users | w | w | w |
| All processes (BSD Style) | ps aux | ps aux | ps aux |
| All processes (POSIX Style) | ps -ef | ps -ef | ps -ef |
| Uptime | uptime | uptime | uptime |
| Hard DNS | cat /etc/hosts | cat /etc/hosts | cat /etc/hosts |
| DNS Resolvers | cat /etc/resolv.conf | cat /etc/resolv.conf | cat /etc/resolv.conf |
| Processes for user | ps -U [user] | ps -U [user] | ps -U [user] |
| Listening Ports | netstat -lntp | netstat -lntp | netstat -lntp |
| Mounted Devices | mount | mount | mount |
| System Mounts | cat /etc/fstab | cat /etc/fstab | cat /etc/fstab |
| Kernel Version (All) | uname -a | uname -a | uname -a |
| Release information | cat /etc/redhat-release | cat /etc/debian_version | cat /etc/os-release |
| Cron information | crontab -u -l [user] | crontab -u -l [user] | systemctl list-timers |
| Loaded Kernel Modules | lsmod | lsmod | lsmod |
| Running Services | chkconfig --list | service --status-all | systemctl list-units |
| Startup Script Directory | /etc/init.d | /etc/init.d | /usr/lib/systemd/system |
| Firewall Settings | iptables -L | iptables -L | firewall-cmd --list-all |
| Kernel Log | dmesg | dmesg | dmesg |
| Memory Usage | free -m | free -m | free -m |
| CPU Info | cat /proc/cpuinfo | cat /proc/cpuinfo | cat /proc/cpuinfo |
| PCI Devices | lspci | lspci | lspci |
| USB Devices | lsusb | lsusb | lsusb |
| Attached Disks | lsblk | lsblk | lsblk |
| Start Service | /etc/init.d/[name] start | service [name] start | systemctl start [name] |
| Stop Service | /etc/init.d/[name] stop | service [name] stop | systemctl stop [name] |
| Enable Service | chkconfig [name] on | update-rc.d [name] defaults | systemctl enable [name] |
| Disable Service | chkconfig [name] off | update-rc.d [name] disable | systemctl disable [name] |
| Service File Directory | /etc/init.d/ | /etc/rc{0,1,2,3,4,5,6}.d/ | /usr/lib/systemd/system/ |
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