Changes in RHEL6 and RHEL7

Changes in RHEL6 and RHEL7

Administrative command and config-file changes

System Basics

Task	RHEL6	RHEL7
View RH subscribe information	/Etc/sysconfig/rhn/systemid Subscribe-manager identity	Subscribe-manager identity
Configure RH submodules	Rhn_register Rhnreg_ks Subscribe-manager	Subscribe-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 Date	Timedatectl Date
Synchronize time and date	Ntpdate /Etc/ntp. conf	Ntpdate /Etc/chrony. conf
Configure keyboard	System-config-keyboard	Localectl

Jobs and services

Task	RHEL6	RHEL7
List all services	Chkconfig Ls/etc/init. d/	Systemctl-at service 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 Service name stop	Systemctl start name. service Systemctl stop name. service
Enable/disable a service	Chkconfig name on Chkconfig name off	Systemctl enable name. service 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.tar get 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 using line
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. conf	/Etc/default/grub Grub2-mkconfig Grub-set-default

Software management

Task	RHEL6	RHEL7
Install software	Yum install Yum groupinstall	Yum install Yum group install
View software info	Yum info Yum groupinfo	Yum info 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 Lvextend Resize2fs	Vgextend Lvextend 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