Common administrative commands in Red Hat Enterprise Linux 5, 6, 7, and 8 System basics File systems, volumes, and disks Jobs and services TASK RHEL TASK RHEL TASK RHEL /etc/sysconfig/rhn/ ext3 5 chkconfig --list 5 6 5 6 View systemid Default file ls /etc/init.d/ subscription ext4 6 subscription-manager system systemctl -at service information 6 7 8 identity xfs 7 8 ls /etc/systemd/system/*. service 7 ssm create 7 rhnreg_ks 6 List all ls /usr/lib/systemd/ system/*.service Create/ gdisk 7 8 services Configure rhn_register 1, 3 5 6 7 8 modify disk systemctl list-units -at subscription ssm_create 8 partitions service subscription-manager 2 6 7 8 find /etc/systemd/ / fdisk usr/lib/systemd/ / 8 parted 5 6 7 8 hwbrowser 5 run/systemd/ -name *.service” ssm create sosreport 7 8 5 6 7 8 dmidecode Format disk service --status-all 5 6 mkfs.filesystem_type (ext4, List running View system partition xfs) lstopo 5 6 7 8 systemctl -t service profile mkswap services lscpu 6 7 8 --state=active 7 8 xfs_fsr cat/proc/cpuinfo 6 7 8 service name start lshw 8 5 6 Defragment copy data to new file service name stop system Start/stop disk space systemctl start name. View RHEL fsck (look for ‘non-contig- 5 6 7 8 service service version /etc/redhat-release 5 6 7 8 uous inodes’) 7 8 systemctl stop name. information ssm mount 7 8 service Mount chkconfig name on 1 Be aware of potential issues when using subscription-manager on Red storage mount 5 6 Hat Enterprise Linux 5: https://access.redhat.com/solutions/129003. /etc/fstab 5 6 7 8 chkconfig name off Enable/ 2 Subscription-manager is used for Satellite 6, Satellite 5.6 with SAM disable systemctl enable name. and newer, and Red Hat’s CDN. Mount and /etc/fstab 5 6 7 8 service service swapon -a 7 8 3 RHN tools are deprecated on Red Hat Enterprise Linux 7. rhn_register activate swap systemctl disable name. should be used for Satellite server 5.6 and newer only. For details, see: service What subscription management services are offered by RHSM?, Configure /etc/fstab Transition of Red Hat Network Classic Hosted to Red Hat Subscription static mounts 5 6 7 8 service name status 5 6 Management, and Satellite 5.6 unable to register RHEL 7 client system View service due to rhn-setup package not included in Minimal installation. status systemctl status name. service 7 8 View free disk df space 5 6 7 8 Check if chkconfig name --list 5 6 lvdisplay service is lvs enabled systemctl is-enabled name 7 8 Software management View logical vgdisplay volume info vgs 5 6 7 8 TASK RHEL chkconfig --add 5 6 pvdisplay Create new pvs service file systemctl daemon-reload yum groupinstall 5 6 or modify /etc/systemd/system/*. 7 8 Install Create ssm create (if backend is configuration service yum group install 8 software 7 8 physical lvm) volume runlevel 5 6 yum install 5 6 7 8 pvcreate 5 6 7 8 View run systemctl get-default 7 8 yum groupinfo 5 6 ssm create (if backend is level/target Create volume lvm) 8 View software who -r 5 6 7 8 yum group info 7 8 group info vgcreate 5 6 7 8 /etc/inittab 5 6 yum info 5 6 7 8 init run_level ssm create (if backend is Change run 8 Create logical lvm) level/target systemctl isolate name. Update volume yum update 5 6 7 8 target 7 8 software lvcreate 5 6 7 8 systemctl set-default resize2fs 5 6 /etc/syslog.conf 5 Upgrade yum upgrade Enlarge software 5 6 7 8 volumes xfs_growfs Configure /etc/rsyslog.conf 6 7 8 formatted ssm resize 7 8 logging Configure subscription-manager with default /etc/rsyslog.d/*.conf vgextend /var/log/journal software repos file system 7 8 5 6 7 8 lvextend 5 6 7 8 systemd-journald.service repository /etc/yum.repos.d/*.repo resize2fs journalctl 7 8 Shrink Find package rpm -qf filename lvreduce 5 6 View logs 5 6 7 8 volumes vgreduce /var/log 5 6 7 8 owning file yum provides filename-glob formatted XFS cannot currently be pam_tty_audit kernel with default 5 6 7 rpm -q packagename 5 6 file system shrunk; copy desired data 7 8 module to a smaller file system. View software yum list installed tlog 8 version packagename 7 8 ssm check 8 Check/repair Configure add audit=1 to kernel rpm -q packagename file system fsck 5 6 7 8 system audit cmdline auditctl View installed rpm -qa /etc/audit/auditd.conf 5 6 7 8 showmount -e 5 6 7 8 View NFS /etc/audit/audit.rules software yum list installed mount 5 6 7 8 share authconfig /etc/pam.d/system-auth Install a yum module install service nfs reload 8 5 6 module module_name View audit aureport Configure systemctl reload nfs. output /var/log/faillog 5 6 7 NFS share service 7 8 View info on a yum module info 8 module module_name /etc/exports 5 6 7 8 cron Schedule/ at 5 6 7 8 batch /etc/auto.master.d/*. batch tasks View a yum module info Configure module’s 8 on-demand autofs 8 module_name systemd-run --on-calendar 8 streams auto-mounts /etc/auto.* Find file by locate yum module remove chmod name 5 6 7 8 module_name:stream Change file chown Change chgrp 8 yum module reset permissions Find file by module 8 umask (future file find 5 6 7 8 streams module:stream creation) characteristic yum module install module:new_stream tar Change file chattr 8 cpio attributes Create archive 5 6 7 8 List available zip yum module list 8 xz modules Change access setfacl 8 control list Basic configuration Kernel, boot, and hardware Security and identity TASK RHEL TASK RHEL TASK RHEL Graphical system-config-* 5 6 append 1 or s or init=/ /etc/selinux/config configuration bin/bash to kernel 5 6 Configure chcon cmdline tools gnome-control-center 7 8 Single user/ system restorecon semanage 5 6 7 8 rescue mode append 1 or s or rd.break security setsebool or init=/bin/bash to Text-based 7 8 system-config-selinux kernel cmdline configuration system-config-*-tui 5 6 tools Report on Shut down shutdown 5 6 7 8 system sealert system 5 6 7 8 Configure system-config-printer 5 6 7 security printer systemctl poweroff 7 8 gnome-control-center 8 Power off authconfig system authconfig-tui 5 6 7 system-config-date 5 6 poweroff 5 6 7 8 LDAP, SSSD, authconfig-gtk Kerberos timedatectl 7 8 systemctl halt 7 8 Configure authselect 8 time and date Halt system date 5 6 7 8 halt 5 6 7 8 Network users getent 5 6 7 8 gnome-control-center 8 Reboot systemctl reboot 7 8 /etc/ntp.conf 5 6 system reboot 5 6 7 8 ntpdate 5 6 7 Configure /etc/inittab 5 6 Synchronize timedatectl default run time and date 7 8 /etc/chrony.conf level/target systemctl set-default 7 8 User management date TASK RHEL /boot/grub/grub.conf chronyc 8 Configure 5 6 system-config-users GRUB /etc/default/grub Graphical user 5 6 7 system-config-keyboard 5 6 bootloader grub2-mkconfig management 7 8 gnome-control-center Configure grub-set-default 8 localectl keyboard 7 8 hwbrowser 5 Create user useradd 5 6 7 gnome-control-center 8 View hardware account lshw (in EPEL) 6 7 gnome-control-center 8 /etc/ssh/ssh_config configured Configure /etc/ssh/sshd_config lshw 8 userdel 5 6 7 SSH ~/.ssh/config 5 6 7 8 Delete user ssh-keygen account Configure gnome-control-center 8 modprobe 5 6 7 8 kernel module usermod View/change /etc/passwd Configure 5 6 7 user account vipw hardware udev Networking 5 6 7 8 details id device TASK RHEL gnome-control-center 8 View kernel sysctl -a Configure nmcli con mod 7 8 parameters cat /proc/cmdline 5 6 7 8 Create user groupadd 5 6 7 name group /etc/hosts gnome-control-center 8 5 6 7 8 resolution /etc/resolv.conf Load kernel modprobe 5 6 7 8 module Delete user groupdel 5 6 7 /etc/sysconfig/network 5 6 group Configure gnome-control-center 8 hostnamectl Remove hostname modprobe -r 5 6 7 8 /etc/hostname 7 8 kernel module groupmod 5 6 7 nmtui Change group /etc/group View kernel rpm -q kernel details ifconfig 5 6 version uname -r 5 6 7 8 gnome-control-center 8 nmcli dev show passwd 5 6 7 View network teamdctl 7 8 Change user password interface info bridge gnome-control-center 8 ip addr 5 6 7 8 usermod brctl 5 6 7 Resource management Change user visudo permissions nmcli con [add|mod|edit] TASK RHEL Configure nmtui 7 8 gnome-control-center 8 nm-connection-editor network Trace system strace 5 6 7 8 Change chage 5 6 7 interface /etc/sysconfig/ calls 5 6 7 8 password network-scripts/ifcfg-* policy gnome-control-center 8 Trace library ltrace View routes ip route 5 6 7 8 calls 5 6 7 8 View user w 5 6 7 system-config-network 5 6 sessions Change gnome-control-center 8 nice nmcli process renice 5 6 7 8 Configure nmtui 7 8 priority routes nm-connection-editor Change ip route add 5 6 7 8 taskset /etc/sysconfig/route-iface process run 5 6 7 8 location iptables and ip6tables 5 6 /etc/sysconfig/ip*tables kill Kill a process pkill 5 6 7 8 Configure system-config-firewall 6 killall firewall firewall-cmd 7 8 netstat 5 6 firewall-config ss nftables 8 tuna 6 7 8 pcp-dstat--socket 8 pcp atop 8 View ports/ View system ss top sockets usage lsof 5 6 7 8 ps netstat sar iostat 5 6 7 8 vmstat mpstat numastat iostat 6 7 8 View disk pcp-dstat usage pmiostat 8 df 5 6 7 8 5/19 Copyright © 2019 Red Hat, Inc.