구차니의 잡동사니 모음

MVAPICH: MPI over InfiniBand, Omni-Path, Ethernet/iWARP, and RoCE

[링크 : https://mvapich.cse.ohio-state.edu/]

기본적으로 infiniband, ommipath, RDMA(xeon) 등에서 작동되는 녀석이지

일반적인 기가비트 이더넷 등에서 작동할 녀석은 아닌듯?

[링크 : https://en.wikipedia.org/wiki/MVAPICH]

특이하게도 가상화쪽에서 SR-IOV가 나오는것도 존재한다.

/etc/inittab이 안되서 찾아보니

systemctl set-default 명령을 통해서 바꾸면 된다.

# systemctl get-default
graphical.target

# systemctl set-default multi-user.target
Created symlink /etc/systemd/system/default.target → /usr/lib/systemd/system/multi-user.target.

# systemctl get-default
multi-user.target

# systemctl list-units -t target -a
  UNIT                      LOAD      ACTIVE   SUB    DESCRIPTION
  basic.target              loaded    active   active Basic System
  cryptsetup.target         loaded    active   active Local Encrypted Volumes
  emergency.target          loaded    inactive dead   Emergency Mode
  getty-pre.target          loaded    inactive dead   Login Prompts (Pre)
  getty.target              loaded    active   active Login Prompts
  graphical.target          loaded    inactive dead   Graphical Interface
  initrd-fs.target          loaded    inactive dead   Initrd File Systems
  initrd-root-device.target loaded    inactive dead   Initrd Root Device
  initrd-root-fs.target     loaded    inactive dead   Initrd Root File System
  initrd-switch-root.target loaded    inactive dead   Switch Root
  initrd.target             loaded    inactive dead   Initrd Default Target
  local-fs-pre.target       loaded    active   active Local File Systems (Pre)
  local-fs.target           loaded    active   active Local File Systems
  multi-user.target         loaded    active   active Multi-User System
  network-online.target     loaded    active   active Network is Online
  network-pre.target        loaded    active   active Network (Pre)
  network.target            loaded    active   active Network
  nfs-client.target         loaded    active   active NFS client services
  nss-lookup.target         loaded    inactive dead   Host and Network Name Lookups
  nss-user-lookup.target    loaded    active   active User and Group Name Lookups
  paths.target              loaded    active   active Paths
  remote-fs-pre.target      loaded    active   active Remote File Systems (Pre)
  remote-fs.target          loaded    active   active Remote File Systems
  rescue.target             loaded    inactive dead   Rescue Mode
  rpc_pipefs.target         loaded    active   active rpc_pipefs.target
  rpcbind.target            loaded    active   active RPC Port Mapper
  shutdown.target           loaded    inactive dead   Shutdown
  slices.target             loaded    active   active Slices
  sockets.target            loaded    active   active Sockets
  sound.target              loaded    active   active Sound Card
  sshd-keygen.target        loaded    active   active sshd-keygen.target
  swap.target               loaded    active   active Swap
  sysinit.target            loaded    active   active System Initialization
● syslog.target             not-found inactive dead   syslog.target
  time-sync.target          loaded    inactive dead   System Time Synchronized
  timers.target             loaded    active   active Timers
  umount.target             loaded    inactive dead   Unmount All Filesystems

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

37 loaded units listed.
To show all installed unit files use 'systemctl list-unit-files'.

[링크 : https://www.linuxfork.com/how-to-change-the-run-level-on-rhel-centos-7-8/]

+

아래는 안되는 왜 한지 모르겠는 뻘짓

--force를 주고도 한번에 안되서 여러번을 하고 나서야 되네..

stop 하고 나서 된건진 잘 모르겠다.

그리고 여전히 gui로 켜지는건 달라지지 않았다 ㅠㅠ

]# systemctl list-units -t target -a
  UNIT                      LOAD      ACTIVE   SUB    DESCRIPTION
  basic.target              loaded    active   active Basic System
  cryptsetup.target         loaded    active   active Local Encrypted Volumes
  emergency.target          loaded    inactive dead   Emergency Mode
  getty-pre.target          loaded    inactive dead   Login Prompts (Pre)
  getty.target              loaded    active   active Login Prompts
  graphical.target          loaded    active   active Graphical Interface
  initrd-fs.target          loaded    inactive dead   Initrd File Systems
  initrd-root-device.target loaded    inactive dead   Initrd Root Device
  initrd-root-fs.target     loaded    inactive dead   Initrd Root File System
  initrd-switch-root.target loaded    inactive dead   Switch Root
  initrd.target             loaded    inactive dead   Initrd Default Target
  local-fs-pre.target       loaded    active   active Local File Systems (Pre)
  local-fs.target           loaded    active   active Local File Systems
  multi-user.target         loaded    active   active Multi-User System
  network-online.target     loaded    active   active Network is Online
  network-pre.target        loaded    active   active Network (Pre)
  network.target            loaded    active   active Network
  nfs-client.target         loaded    active   active NFS client services
  nss-lookup.target         loaded    inactive dead   Host and Network Name Lookups
  nss-user-lookup.target    loaded    active   active User and Group Name Lookups
  paths.target              loaded    active   active Paths
  remote-fs-pre.target      loaded    active   active Remote File Systems (Pre)
  remote-fs.target          loaded    active   active Remote File Systems
  rescue.target             loaded    inactive dead   Rescue Mode
  rpc_pipefs.target         loaded    active   active rpc_pipefs.target
  rpcbind.target            loaded    active   active RPC Port Mapper
  shutdown.target           loaded    inactive dead   Shutdown
  slices.target             loaded    active   active Slices
  sockets.target            loaded    active   active Sockets
  sound.target              loaded    active   active Sound Card
  sshd-keygen.target        loaded    active   active sshd-keygen.target
  swap.target               loaded    active   active Swap
  sysinit.target            loaded    active   active System Initialization
● syslog.target             not-found inactive dead   syslog.target
  time-sync.target          loaded    inactive dead   System Time Synchronized
  timers.target             loaded    active   active Timers
  umount.target             loaded    inactive dead   Unmount All Filesystems

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

37 loaded units listed.
To show all installed unit files use 'systemctl list-unit-files'.


# systemctl status graphical.target
● graphical.target - Graphical Interface
   Loaded: loaded (/usr/lib/systemd/system/graphical.target; indirect; vendor preset: disabled)
   Active: active since Mon 2020-12-14 00:20:24 EST; 7min ago
     Docs: man:systemd.special(7)

12월 14 00:20:24 localhost.localdomain systemd[1]: Reached target Graphical Interface.

# systemctl disable  graphical.target
Removed /etc/systemd/system/default.target.

# systemctl disable graphical.target --force

# systemctl status graphical.target
● graphical.target - Graphical Interface
   Loaded: loaded (/usr/lib/systemd/system/graphical.target; static; vendor preset: disabled)
   Active: inactive (dead) since Mon 2020-12-14 00:33:58 EST; 8s ago
     Docs: man:systemd.special(7)

12월 14 00:29:09 localhost.localdomain systemd[1]: Reached target Graphical Interface.
12월 14 00:33:58 localhost.localdomain systemd[1]: Stopped target Graphical Interface.

]# systemctl list-units -t target -a
  UNIT                      LOAD      ACTIVE   SUB    DESCRIPTION
  basic.target              loaded    active   active Basic System
  cryptsetup.target         loaded    active   active Local Encrypted Volumes
  emergency.target          loaded    inactive dead   Emergency Mode
  getty-pre.target          loaded    inactive dead   Login Prompts (Pre)
  getty.target              loaded    active   active Login Prompts
  graphical.target          loaded    inactive dead   Graphical Interface
  initrd-fs.target          loaded    inactive dead   Initrd File Systems
  initrd-root-device.target loaded    inactive dead   Initrd Root Device
  initrd-root-fs.target     loaded    inactive dead   Initrd Root File System
  initrd-switch-root.target loaded    inactive dead   Switch Root
  initrd.target             loaded    inactive dead   Initrd Default Target
  local-fs-pre.target       loaded    active   active Local File Systems (Pre)
  local-fs.target           loaded    active   active Local File Systems
  multi-user.target         loaded    active   active Multi-User System
  network-online.target     loaded    active   active Network is Online
  network-pre.target        loaded    active   active Network (Pre)
  network.target            loaded    active   active Network
  nfs-client.target         loaded    active   active NFS client services
  nss-lookup.target         loaded    inactive dead   Host and Network Name Lookups
  nss-user-lookup.target    loaded    active   active User and Group Name Lookups
  paths.target              loaded    active   active Paths
  remote-fs-pre.target      loaded    active   active Remote File Systems (Pre)
  remote-fs.target          loaded    active   active Remote File Systems
  rescue.target             loaded    inactive dead   Rescue Mode
  rpc_pipefs.target         loaded    active   active rpc_pipefs.target
  rpcbind.target            loaded    active   active RPC Port Mapper
  shutdown.target           loaded    inactive dead   Shutdown
  slices.target             loaded    active   active Slices
  sockets.target            loaded    active   active Sockets
  sound.target              loaded    active   active Sound Card
  sshd-keygen.target        loaded    active   active sshd-keygen.target
  swap.target               loaded    active   active Swap
  sysinit.target            loaded    active   active System Initialization
● syslog.target             not-found inactive dead   syslog.target
  time-sync.target          loaded    inactive dead   System Time Synchronized
  timers.target             loaded    active   active Timers
  umount.target             loaded    inactive dead   Unmount All Filesystems

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

37 loaded units listed.
To show all installed unit files use 'systemctl list-unit-files'.

[링크 : https://linuxconfig.org/how-to-change-a-runlevel-on-rhel-7-linux-system]

centos8.2는 minimal로 설치해서 그런가 virbr0 가 안생기더니 풀버전으로 설치했더니 생기네.

libvirtd 데몬으로 인해서 생기는 녀석이라고 한다.

[링크 : https://fliedcat.tistory.com/167]

8.2-2004 에서는 minimal 버전이라 그랬나 10기가에서도 깔렸는데

8.3-2011 에서는 10GB 밖에 안되니 용량 늘려라고 진행 자체가 안된다

그런데 8.2 에서는 minimal이 있었는데

8.3 에서는 왜 minimal을 제공하지 않는 걸까?

+

virtual box 에서 centos8.3 설치하니 네트워크가 아노딘다.

virbr0가 잡히고 enp3s 어쩌구는 ip를 못받아온다. 멀까?

+

그래픽 컨트롤러가 원래 VMSVGA 였던가?

이미 닳아버릴대로 닳은게 보이네.

+

원본에서 크랍

짧은 거리를 오가면서 저항값이 바뀌는 구조인 듯.

로터리 저항으로 된 건 큰부품이고

이건 높이가 낮아야 하니 저런식으로 FPCB에 저항막을 붙이고 갈려 나가게 해서 내구성은 어짜피 발바닥인 듯..

클릭은 하단의 흰색 부품이 FPCB에 실장된 스위치(위 사진의 정 중앙 은색 부품)을 누르게 되어있다.

전투력 느낌인데 -_-

100 밑돌던 시대가 어떻게 가능했나 싶을 정도로 정말

이제는 이게 기준인가 싶을 정도 ㅠㅠ

조이스틱만 5천원 정도에 판매를 하고 있고

2개 + 공구(Y/+ 드라이버 및 핀셋) 해서 1.6만원에 팔고 있어서 낼름 구매

(공구 가격을 좀 남겨 먹는 느낌이지만..)

조이콘 수리기는 많이들 있어서 대충 보고 따라하는데

의외로 조립이 쉽지 않은 구조에 깜놀.

(전용 지그를 가지고 조립하지 않으면 조이스틱 부분에 눌려서 붕 뜨고 난리가 남)

12:47 ~ 13:00 이니까

대충 각잡고 수리하는데 15분 정도는 걸렸네(사진 안찍고 하면 다음번 수리는 10분이면 될려나?)

700은 안넘고 있어서 많아야 700 막 진입할 줄 알았는데 순식간에 1000을 바라보네..

[링크 : https://news.v.daum.net/v/20201212132240592]

[링크 : https://news.daum.net/covid19]

크기가 차이 많이 나는 것 같으면서도

숫자 차이 (12인치) 치고는 그리 크기가 차이 나지 않는 느낌?

(모니터로 쓰고 있으니 일단은 컴퓨터 카테고리 ㅋㅋ)

1. 빨래 세통

옷 + 옷 + 매트 커버 2개

2. 청소

얘는 무한반복..

3. 닌텐도 스위치 방탄필름 교체

4. 조이콘 왼쪽 조이스틱 부품 교체

5. openELEC + rpi2b + CEC

- openELEC에서 삼바가 접속 안되서 조금 헤매긴했는데(그놈의 guest 계정)

  CEC 해두니 리모컨 산 값을 톡톡히 하는 듯. 재생시 -10초 +10초만 해두니 오히려 더 편하다.

6. 포켓몬고

하루 20만 경험치 빡세네.. 레지락 나와서 잡는데 죄다 별 2개.. OTL

7. 첫 녀석 데리고 산책

포켓몬 잡으러 같이 갔는데 겸사겸사 마트 들러서 머리띠 사주려다 돈이 더나간듯..

이브이 핸드폰 줄 하나 얻었음 된거지 머.. (그걸 가장 좋아함)