OS Event log - messages

Oct 14 07:09:07 Hostname kernel: ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20130517/exfield-389)

Oct 14 07:09:07 Hostname kernel: ACPI Error: Method parse/execution failed [\_SB_.PMI0._PMM] (Node ffff88016d9e8ed8), AE_AML_BUFFER_LIMIT (20130517/psparse-536)

Oct 14 07:09:07 Hostname kernel: ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20130517/power_meter-339)


or


May 10 10:14:56 Hostname kernel: ACPI Error: SMBus or IPMI write requires Buffer of length 66, found length 32 (20090903/exfield-286)

May 10 10:14:56 Hostname kernel: ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PMI0._GHL] (Node ffff881074e41d08), AE_AML_BUFFER_LIMIT

May 10 10:14:56 Hostname kernel: ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _GHL (20090903/power_meter-204)



Why do I see "ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PMI0._GHL] (Node ffff8101023768f0), AE_SUPPORT" when my RHEL 5 system boots?
https://access.redhat.com/site/solutions/35475

Resolution
No action is required.  These messages cannot be removed at the current time.


ACPI Error(ACPI Error: SMBus or IPMI write requires Buffer of length X, found length Y)
https://access.redhat.com/site/solutions/48109

Resolution
This message can be safely ignored.


Advisory: ProLiant G6 and G7 Servers - Advanced Configuration and Power Interface (ACPI) Errors May Be Reported by Red Hat Enterprise Linux 6 and SUSE Linux Enterprise Server 11 SP1 During Startup

https://support.hpe.com/hpesc/public/docDisplay?docId=c02642731&docLocale=en_US

Because the System ROM ACPI interface causing these error messages is not used in the Linux operating system environment, these messages are benign and can be safely ignored.




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RHEL7 을 기본 설치 후 ifconfig 명령을 수행하면 오류가 난다. 더이상 기본 패키지가 아니다.


# ifconfig
-bash: ifconfig: command not found


대신 다른 명령을 통해 확인 가능하다. (Check IP Address)

# ip a s
# ip addr show


# ip -s link


너무 익숙해서 다시 사용하고 싶다면, 설치하면 되는 것~


ifconfig 명령을 사용하기 위해 설치해야 하는 패키지 확인

# yum provides ifconfig

# yum whatprovides ifconfig


필요 패키지 설치

# yum install net-tools


이제 잘 된다.

# ifconfig -a

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차차 Bonding을 대체하게될 Teaming을 사용해보자.


# nmcli device status

# nmcli connection show


----------------------------------

# nmcli con add type team con-name CNAME ifname INAME [config JSON]


Where CNAME will be the name used to refer the connection ,INAME will be the interface name and  JSON (JavaScript Object Notation) specifies the runner to be used. JSON has the following syntax:


'{"runner":{"name":"METHOD"}}'


where METHOD is one of the following: broadcast, activebackup, roundrobin, loadbalance or lacp.

----------------------------------


Master 장치 생성

# nmcli connection add con-name team0 type team ifname team0 config '{"runner":{"name":"loadbalance"}}'’


Slave 장치 추가

# nmcli connection add con-name team0-sl1 type team-slave ifname eth1 master team0

# nmcli connection add con-name team0-sl2 type team-slave ifname eth2 master team0



# nmcli connection modify team0 ipv4.addresses 192.168.18.10/24 ipv4.method manual



상태 확인 및 테스트

# teamdctl team0 state


# nmcli connection down team0-sl1


# teamdctl team0 state


# ifup eth1


http://vinzlinux.blogspot.kr/2014/12/configuring-network-teaming-using-nmcli.html

http://myredhatcertification.com/2015/02/03/rhel7-network-configuration/

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-Network_Bonding_Using_the_Command_Line_Interface.html#sec-Create_a_Channel_Bonding_Interface



Posted by 스쳐가는인연
TAG RHEL, RHEL7

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1. 필요한 패키지 사전 설치

# yum install glibc alsa-lib freetype libICE libSM libX11 libXau libXdamage libXext libXfixes libXi libXrandr libXrender libXtst libgcc libuuid libxcb zlib


2. 시스템프록시 구성(필요 시, 택 일)

# export http_proxy=<%ProxyServerAddress:PortNumber%>



3. 설치 패키지 다운로드

# wget http://download.teamviewer.com/download/teamviewer_linux.rpm


4. 패키지 설치 - 사전 필요 패키지를 설치했음에도 의존성 검사가 실패하며 설치가 안되는 경우가 간혹 있더라 ㅡ.ㅡ;

# rpm -Uvh teamviewer_linux.rpm

---------------------

warning: teamviewer_linux.rpm: Header V4 DSA/SHA1 Signature, key ID 72db573c: NOKEY

error: Failed dependencies:

---------------------


5. 패키지 설치 - 의존성 검사를 수행하여 필요 패키지를 함께 설치해준다.

# yum install teamviewer_linux.rpm


6. GUI 화면에서 Teamviewer 수행



참고자료

http://www.itzgeek.com/how-tos/linux/centos-how-tos/how-to-install-teamviewer-on-centos-7-rhel-7.html

Posted by 스쳐가는인연
TAG RHEL, RHEL7

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RHEL7에서 NIC 장치의 명명 규칙이 변화를 갖었다.


RHEL 7 the names have two character prefixes based on the type of interface:

en for Ethernet,

sl for serial line IP (slip),

wl for wireless LAN (WLAN),

ww for wireless wide area network (WWAN).



과거의 ethx 로 장치명을 사용하기 위해

1. MAC Address  확인

[root@RH71 ~]# ip link

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT 

    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000

    link/ether 00:0c:29:ed:ac:b5 brd ff:ff:ff:ff:ff:ff

3: eno33554992: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000

    link/ether 00:0c:29:ed:ac:bf brd ff:ff:ff:ff:ff:ff

4: eno50332216: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT qlen 1000

    link/ether 00:0c:29:ed:ac:c9 brd ff:ff:ff:ff:ff:ff

5: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT 

    link/ether 52:54:00:2c:27:4b brd ff:ff:ff:ff:ff:ff

6: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN mode DEFAULT qlen 500

    link/ether 52:54:00:2c:27:4b brd ff:ff:ff:ff:ff:ff


2. grub 파일을 편집

# vim /etc/default/grub

## add "net.ifnames=0 biosdevname=0" at the end of the "GRUB_CMDLINE_LINUX"


[root@RH71 ~]# cat /etc/default/grub

GRUB_TIMEOUT=5

GRUB_DEFAULT=saved

GRUB_DISABLE_SUBMENU=true

GRUB_TERMINAL_OUTPUT="console"

GRUB_CMDLINE_LINUX="rd.lvm.lv=rhel_rh71/swap rd.lvm.lv=rhel_rh71/root crashkernel=auto rhgb quiet net.ifnames=0 biosdevname=0"

GRUB_DISABLE_RECOVERY="true"


# grub2-mkconfig -o /boot/grub2/grub.cfg


3. ifcfg 파일을 원하는 파일 명으로 변경.

# mv /etc/sysconfig/network-scripts/ifcfg-eno16777736 /etc/sysconfig/network-scripts/ifcfg-enoeth0

# vim ifcfg-enoeth0


4. 명명 규칙 변경

[root@RH71 ~]# vim /etc/udev/rules.d/70-persistent-net.rules

--------------------------

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:ed:ac:b5", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eno16777736", NAME="eth0"

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:ed:ac:bf", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eno33554992", NAME="eth1"

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:ed:ac:c9", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eno50332216", NAME="eth2"

--------------------------


5. 리부팅하여 상태 확인

# systemctl reboot


참고자료

http://ask.xmodulo.com/change-network-interface-name-centos7.html


Posted by 스쳐가는인연
TAG RHEL, RHEL7

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