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Common administrative commands in Enterprise 5, 6, 7, and 8

System basics systems, volumes, and disks Jobs and services

TASK RHEL TASK RHEL TASK RHEL

/etc/sysconfig/rhn/ ext3 5 chkconfig --list View systemid 5 6 Default file /etc/.d/ 5 6 subscription system ext4 6 subscription-manager systemctl - service information 6 7 8 xfs identity 7 8 ls /etc// system/*.service 7 ssm create 7 rhnreg_ks 6 List all ls /usr/lib/systemd/ system/*.service Configure Create/ gdisk 7 8 services 1, 3 5 6 7 8 rhn_register modify disk subscription ssm_create 8 systemctl list-units partitions -at service 2 6 7 8 subscription-manager /etc/systemd/ / 8 5 6 7 8 usr/lib/systemd/ / hwbrowser 5 parted run/systemd/ -name sosreport ssm create 7 8 *.service” dmidecode 5 6 7 8 disk View system mkfs.filesystem_type service --status-all 5 6 partition List running profile lstopo (ext4, xfs) 5 6 7 8 6 7 8 systemctl -t service lscpu mkswap services 7 8 --state=active /proc/cpuinfo xfs_fsr 6 7 8 8 service name lshw 5 6 Defragment data to new file service name stop system disk space 5 6 7 8 View RHEL fsck (look for ‘non-con- Start/stop systemctl start name. version /etc/redhat-release 5 6 7 8 tiguous inodes’) service service 7 8 information systemctl stop name. ssm mount 7 8 service Mount storage mount chkconfig name on 1 Be aware of potential issues when using subscription-manager on 5 6 7 8 5 6 5: https://access.redhat.com/ /etc/fstab chkconfig name off solutions/129003. Enable/ Mount and /etc/fstab disable systemctl enable name. 2 Subscription-manager is used for 6, Satellite 5.6 with SAM swapon -a 5 6 7 8 service and newer, and Red Hat’s CDN. activate swap service 7 8 systemctl disable name. 3 RHN tools are deprecated on Red Hat Enterprise Linux 7. rhn_register service should be used for Satellite server 5.6 and newer only. For details, Configure /etc/fstab 5 6 7 8 see: What subscription management services are offered by RHSM?, static mounts service name status 5 6 Transition of Red Hat Network Classic Hosted to Red Hat View service systemctl status name. Subscription Management, and Satellite 5.6 unable to register status 7 8 View free disk service RHEL 7 client system due to rhn-setup package not included in 5 6 7 8 Minimal installation. space Check if chkconfig name --list 5 6 lvdisplay service is systemctl is-enabled lvs enabled name 7 8 View logical vgdisplay vgs 5 6 7 8 Software management volume info chkconfig --add pvdisplay Create new 5 6 TASK RHEL pvs service file systemctl daemon-reload or modify /etc/systemd/system/*. ssm create (if backend 7 8 groupinstall 5 6 Create configuration service is lvm) 8 Install physical yum group install software 7 8 volume pvcreate 5 6 7 8 runlevel 5 6 View run systemctl get-default yum install 5 6 7 8 ssm create (if backend level/target 7 8 Create volume 8 is lvm) -r 5 6 7 8 yum groupinfo 5 6 group vgcreate 5 6 7 8 /etc/inittab View software 5 6 yum group info 7 8 init run_level info ssm create (if backend Change run Create logical is lvm) 8 yum info 5 6 7 8 level/target systemctl isolate name. volume target 7 8 lvcreate 5 6 7 8 systemctl set-default Update yum update 5 6 7 8 software resize2fs /etc/syslog.conf Enlarge 5 6 5 volumes xfs_growfs /etc/rsyslog.conf 6 7 8 Upgrade 7 8 Configure yum upgrade 5 6 7 8 formatted ssm resize software with default logging /etc/rsyslog.d/*.conf /var/log/journal file system vgextend 7 8 5 6 7 8 systemd-journald. subscription-manager lvextend Configure service software repos 5 6 7 8 resize2fs repository /etc/yum.repos.d/*.repo Shrink lvreduce 5 6 journalctl 7 8 volumes vgreduce View logs /var/log 5 6 7 8 rpm -qf filename formatted Find package XFS cannot currently be yum provides 5 6 7 8 with default shrunk; copy desired pam_tty_audit kernel owning file 7 8 5 6 7 filename-glob file system data to a smaller file module system. tlog 8 rpm -q packagename 5 6 ssm check 8 View software Check/repair Configure add audit=1 to kernel yum list installed file system system audit cmdline version fsck 5 6 7 8 packagename 7 8 auditctl /etc/audit/auditd.conf rpm -q packagename 5 6 7 8 View NFS showmount -e /etc/audit/audit.rules share mount 5 6 7 8 authconfig View installed rpm -qa 5 6 7 8 /etc/pam.d/system-auth software yum list installed service nfs reload 5 6 View audit aureport 5 6 7 Install a yum module install Configure systemctl reload nfs. output /var/log/faillog 8 7 8 module module_name NFS share service /etc/exports 5 6 7 8 at 5 6 7 8 View info on a yum module info Schedule/ 8 batch module module_name Configure /etc/auto.master.d/*. batch tasks systemd-run on-demand autofs 8 8 auto-mounts /etc/auto.* --on-calendar View a yum module info module’s 8 module_name Find file by streams locate name 5 6 7 8 Change file 8 yum module remove permissions (future file module_name:stream Find file by find Change creation) characteristic 5 6 7 8 yum module reset module 8 module:stream Change file streams chattr 8 yum module install attributes cpio Create archive 5 6 7 8 module:new_stream zip Change xz setfacl List available yum module list access 8 modules 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 gnome-control-center 7 8 Single user/ cmdline system restorecon tools semanage 5 6 7 8 rescue mode append 1 or s or security setsebool Text-based rd.break or init=/bin/ 7 8 system-config-selinux bash to kernel cmdline configuration system-config-*-tui 5 6 tools Report on Shut down 5 6 7 8 system sealert 5 6 7 8 system security Configure system-config-printer 5 6 7 printer gnome-control-center 8 Power off systemctl poweroff 7 8 authconfig authconfig-tui 5 6 7 system-config-date system LDAP, SSSD, 5 6 poweroff 5 6 7 8 authconfig-gtk Kerberos timedatectl 7 8 Configure systemctl halt 7 8 authselect 8 Halt system and date 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 /etc/inittab Synchronize timedatectl Configure 5 6 time and date /etc/chrony.conf 7 8 default run User management level/target systemctl set-default 7 8 date TASK RHEL 8 chronyc /boot/grub/grub.conf Configure 5 6 Graphical user system-config-users 5 6 7 system-config-keyboard 5 6 GRUB /etc/default/grub management Configure gnome-control-center 8 localectl 7 8 bootloader grub2-mkconfig 7 8 keyboard grub-set-default useradd 5 6 7 gnome-control-center 8 Create user hwbrowser 5 account gnome-control-center 8 /etc/ssh/ssh_config View hardware Configure /etc/ssh/sshd_config lshw (in EPEL) 6 7 5 6 7 8 configured SSH ~/.ssh/config Delete user userdel 5 6 7 ssh-keygen lshw 8 account gnome-control-center 8

Configure modprobe usermod kernel module 5 6 7 8 /etc/passwd View/change 5 6 7 vipw Configure user account Networking details id hardware udev 5 6 7 8 TASK RHEL device gnome-control-center 8

nmcli con mod Configure 7 8 View kernel sysctl -a Create user groupadd 5 6 7 name parameters cat /proc/cmdline 5 6 7 8 /etc/hosts group 5 6 7 8 gnome-control-center 8 resolution /etc/resolv.conf Load kernel groupdel 5 6 7 /etc/sysconfig/network 5 6 modprobe 5 6 7 8 Delete user module group Configure gnome-control-center 8 hostnamectl hostname /etc/hostname 7 8 Remove modprobe -r 5 6 7 8 groupmod nmtui 5 6 7 kernel module Change group /etc/group details ifconfig 5 6 View kernel rpm -q kernel gnome-control-center 8 5 6 7 8 nmcli dev show version -r View network teamdctl 7 8 Change user passwd 5 6 7 interface info bridge password gnome-control-center 8 ip addr 5 6 7 8 brctl usermod 5 6 7 Change user visudo nmcli con Resource management permissions [add|mod|edit] Configure 7 8 gnome-control-center 8 nmtui TASK RHEL network -connection-editor chage interface Change 5 6 7 /etc/sysconfig/ Trace system 5 6 7 8 5 6 7 8 password network-scripts/ifcfg-* calls policy gnome-control-center 8

ip 5 6 7 8 View routes Trace library w 5 6 7 ltrace 5 6 7 8 View user calls sessions system-config-network 5 6 gnome-control-center 8

nmcli Change nmtui Configure 7 8 process renice 5 6 7 8 routes nm-connection-editor priority ip route add /etc/sysconfig/ 5 6 7 8 Change route-iface process run taskset 5 6 7 8 location iptables and ip6tables 5 6 /etc/sysconfig/ip*tables Kill a process pkill 5 6 7 8 system-config-firewall 6 Configure killall firewall firewall-cmd 7 8 5 6 firewall-config ss nftables 8 tuna 6 7 8

pcp-dstat--socket 8 pcp atop 8 View ports/ View system ss usage top sockets lsof 5 6 7 8 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

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