| Administrative command and config-file changes | ||
| System Basics | ||
| Task | RHEL6 | RHEL7 |
| View RH subscription information | /etc/sysconfig/rhn/systemid subscription-manager identity | subscription-manager identity |
| Configure RH subscription | rhn_register rhnreg_ks subscription-manager | subscription-manager14 rhn_register15 |
| Basic Configuration | ||
| Task | RHEL6 | RHEL7 |
| Graphical configuration tools | system-config-* | gnome-control-center |
| Configure network | system-config-network | nmcli nmtui nm-connection-editor |
| Configure system language | system-config-language | localectl |
| Configure system time and date | system-config-date | timedatectl |
| date | date | |
| Synchronize time and date | ntpdate | ntpdate |
| /etc/ntp.conf | /etc/chrony.conf | |
| Configure keyboard | system-config-keyboard | localectl |
| Jobs and services | ||
| Task | RHEL6 | RHEL7 |
| List all services | chkconfig | systemctl -at service |
| ls /etc/init.d/ | ls /{usr/lib,etc}/systemd/system/*.service | |
| List running services | service –status-all | systemctl -t service –state=active |
| Start/stop a service | service name start | systemctl start name.service |
| service name stop | systemctl stop name.service | |
| Enable/disable a service | chkconfig name on | systemctl enable name.service |
| chkconfig name off | systemctl disable name.service | |
| Check if service enabled | chkconfig name | systemctl is-enabled name |
| View service status | service name status | systemctl status name.service |
| Create service file or change config | chkconfig –add | systemctl daemon-reload |
| View runlevel/target | runlevel | systemctl get-default |
| Change runlevel/target | init runlevel | systemctl isolate name.target |
| init runlevel | ||
| Configure logging | /etc/rsyslog.conf | /etc/rsyslog.conf |
| /etc/rsyslog.d/*.conf | ||
| /var/log/journal/ | ||
| /etc/systemd/journald.conf | ||
| View logs | /var/log/ | /var/log/ |
| journalctl | ||
| Kernel, boot, and hardware | ||
| Task | RHEL6 | RHEL7 |
| Bypass root password prompt at boot | append 1 or s or init=/bin/bash to kernel cmdline | append rd.break or init=/bin/bash to kernel cmdline |
| Shut down system | shutdown | systemctl shutdown |
| Power off system | poweroff | systemctl poweroff |
| Halt system | halt | systemctl halt |
| Reboot system | reboot | systemctl reboot |
| Configure default runlevel/target | /etc/inittab | systemctl set-default |
| Configure GRUB bootloader | /boot/grub/grub.conf | /etc/default/grub |
| grub2-mkconfig | ||
| grub-set-default | ||
| Software management | ||
| Task | RHEL6 | RHEL7 |
| Install software | yum install | yum install |
| yum groupinstall | yum group install | |
| View software info | yum info | yum info |
| yum groupinfo | yum group info | |
| File systems, volumes, and disks | ||
| Task | RHEL6 | RHEL7 |
| Create/modify disk partitions | fdisk parted | fdisk parted gdisk |
| Default file system | ext4 | xfs |
| Enlarge volumes formatted with default filesystem | vgextend | vgextend |
| lvextend | lvextend | |
| resize2fs | xfs_growfs | |
| Networking | ||
| Task | RHEL6 | RHEL7 |
| Configure name resolution | /etc/hosts /etc/resolv.conf | /etc/hosts |
| /etc/resolv.conf | ||
| nmcli con mod | ||
| Configure hostname | /etc/sysconfig/network | /etc/hostname |
| hostnamectl | ||
| nmtui | ||
| View network interface info | ip addr ifconfig brctl | ip addr |
| nmcli dev show | ||
| teamdctl | ||
| brctl | ||
| bridge | ||
| Configure network interface | /etc/sysconfig/network-scripts/ifcfg-* | /etc/sysconfig/network-scripts/ifcfg-* |
| nmcli con [add|mod|edit] | ||
| nmtui | ||
| nm-connection-editor | ||
| Configure firewall | iptables & ip6tables /etc/sysconfig/ip*tables system-config-firewall | firewall-cmd firewall-config |
| View ports/sockets | netstat ss lsof | ss lsof |
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