carian string dlm wireshark

1)

2)

 ref: https://www.cellstream.com/reference-reading/tipsandtricks/431-finding-text-strings-in-wireshark-captures

Sejarah ip yg pernah pc ubuntu anda pegang

 history of ip has been assign to your pc

Ada 2 command yg boleh senaraikan IP yg pc anda dapat dari DHCP.

1) sudo cat /var/log/syslog | grep -Ei 'dhcp' | grep ip_address

2) sudo journalctl | grep -Ei 'dhcp' | grep ip_address

cara install apt package specific version

$ apt-cache madison calc calc | 2.12.7.2-4 | http://10.108.201.140/ubuntu/mirror/archive.ubuntu.com/ubuntu focal/universe amd64 Packages calc | 2.10.18-dfsg-2build1 | http://archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages

$ apt-cache policy virtualbox virtualbox: Installed: (none) Candidate: 5.0.40-dfsg-0ubuntu1.16.04.2 Version table: 5.0.40-dfsg-0ubuntu1.16.04.2 500 500 http://cm.archive.ubuntu.com/ubuntu xenial-updates/multiverse amd64 Packages 5.0.18-dfsg-2build1 500 

500 http://cm.archive.ubuntu.com/ubuntu xenial/multiverse amd64 Packages 

ref:
https://linuxopsys.com/topics/install-specific-version-package-apt

Cara nak tahu package apa yg ada dalam apt repo tertentu

cd /var/lib/apt/lists

ls

cari file yg berakhir dengan Packages, cth:
    dl.google.com_linux_chrome_deb_dists_stable_main_binary-amd64_Packages

Dalam file ini, tersenarai nama package yg terdapat dalam repo tersebut.

ref:
https://tecadmin.net/list-all-packages-available-in-a-repository-on-ubuntu/

ceph troubleshoot

1) start with

ceph health detail

2) OSD_FULL

Ceph prevent writing to a full OSD. By default 'full' is set to 0.95. Temporary solution, set full to 0.97

    ceph osd set-full-ratio 0.96

ps: to get more info 
1- ceph osd dump | grep full_ratio
2- ceph df

(ref https://docs.ceph.com/en/quincy/rados/operations/health-checks/)

3) POOL_TOO_FEW_PGS

list pools

ceph osd lspools

To allow the cluster to automatically adjust the number of PGs

ceph osd pool set <pool-name> pg_autoscale_mode on

To manually set the number of PGs for the pool to the recommended amount with:

ceph osd pool set <pool-name> pg_num <new-pg-num>

4) BLUESTORE_NO_PER_POOL_OMAP
Stop the osd, repair, then start again:
eg: osd.123

systemctl stop ceph-osd@123
ceph-bluestore-tool repair --path /var/lib/ceph/osd/ceph-123
systemctl start ceph-osd@123

ceph info gathering

 ceph health

ceph heatlh detail

Extending size of local-lvm(lvm thin) for proxmox

 Prepare new disk to be Physical_Volume
pvcreate /dev/sdj

Add new disk to existing Volume_group
vgextend pve /dev/sdj

Extend size of for local-lvm(lvm thin)
lvextend -L+100G pve/data

Extend size of poolmetadata for local-lvm(lvm thin)
       lvresize --poolmetadatasize +1GB pve/data