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Mailing list test
by Raju Devidas Vindane 17 Feb '24

17 Feb '24

test mailing lists after some DNS foo. Please ignore.

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1D1C - lvcreate / lvs / lvdisplay / lvremove
by Dhanasekar 18 Sep '23

18 Sep '23

lvcreate - Create a Logical Volume in an existing Volume Group. To create logical volume my_vol in an existing volume group myvol_grp # lvcreate --size 500M --name my_vol vol_grp To report logical volume info # lvs To report all logical volume # lvs --all To shows the information of all logical volumes # lvdisplay To display information of a specific logical volume # lvdisplay /path/to/lv To display output in columns # lvdisplay -C To display the mapping of logical extents to physical volumes and physical extents. # lvdisplay --maps To display all the information # lvdisplay -a To remove the logical volume # lvremove path/to/lv To forcefully remove active logical volumes # lvremove -f /path/to/lv regards, T.Dhanasekar

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1D1C - vgremove
by Dhanasekar 17 Sep '23

17 Sep '23

vgremove - Remove a Volume Group To remove a volume group name myvol_grp # vgremove vol_grp regards, T.Dhanasekar

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1D1C - vgcreate / vgdisplay / vgrename / vgs
by Dhanasekar 16 Sep '23

16 Sep '23

vgcreate - Create a Volume Group To create a volume group named vg00 using /dev/sdb and /dev/sdc # vgcreate vg00 /dev/sdb /dev/sdc To Display attributes of Volume Groups # vgdisplay vg00 To rename the name of a volume group # vgrename vg00 demovg To display information about volume groups # vgs To display all volume groups # vgs -a To show more details # vgs -v regards, T.Dhanasekar

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1D1C - pvscan
by Dhanasekar 15 Sep '23

15 Sep '23

pvscan - Scan all disks for Physical Volumes To scan all disks for physical volumes # pvscan To print physical volumes belonging to exported volume groups # pvscan -e To display short listing format # pvscan -s To Show UUIDs # pvscan -u To set to verbose mode # pvscan -v regards, T.Dhanasekar

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1D1C - pvremove
by Dhanasekar 14 Sep '23

14 Sep '23

pvremove - Remove a Physical Volume To remove a physical volumes # pvremove /dev/sdb To set to debug mode # pvremove -d /dev/sdb To force the pv remove # pvremove -f /dev/sdb To test the pvremove # pvremove -t /dev/sdb To set to verbose mode # pvremove -v /dev/sbd To get the pvremove help # pvremove --help regards, T.Dhanasekar

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1D1C - pvresize
by Dhanasekar 13 Sep '23

13 Sep '23

pvresize - Resize a disk or partition in use by LVM2 To adjust the size of the physical volume /dev/sdb # pvresize /dev/sdb To resize a physical volume, by reducing it # pvresize --setphysicalvolumesize 20G /dev/sdb To set to debug mode # pvresize -d To run pvresize in test mode # pvresize -t /dev/sdb To set to verbose mode # pvresize -v To get the help for pvresize # pvresize --help regards, T.Dhanasekar

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1D1C - pvcreate
by Dhanasekar 12 Sep '23

12 Sep '23

pvcreate - Initialize physical volume(s) for use by LVM To create physical volumes on top of /dev/sdb, /dev/sdc # pvcreate /dev/sdb /dev/sdc To report information about Physical Volumes # pvs To display attributes of a Physical Volume # pvdisplay /dev/sdb # pvdisplay /dev/sdc regards, T.Dhanasekar

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1D1C - lvm
by Dhanasekar 11 Sep '23

11 Sep '23

lvm - it provides tools to create virtual block devices from physical devices To start the Logical Volume Manager interactive shell $ lvm lvm> To view the config $ sudo lvm config To display the recognised built-in block device types $ sudo lvm devtypes To view the dumpconfig $ sudo lvm dumpconfig To display recognised metadata formats $ lvm > formats To display information about PVs, PV segments, VGs, LVs and LV segments, all at once $ sudo lvm fullreport To print help options $ sudo lvm help To display log report of last command run in LVM shell if command log reporting is enabled $ sudo lvm lastlog To Display recognised Logical Volume segment types $ sudo lvm segtypes To display version information $ lvm version regards, T.Dhanasekar

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1D1C - journalctl
by Dhanasekar 10 Sep '23

10 Sep '23

journalctl - Query the systemd journal To display all logs $ journalctl To display the new entries first in logs $ journalctl -r To display a specific number of log entries $ journalctl -n 5 To retrieve log entries containing a specific keyword $ journalctl | grep <keyword> $ journalctl | grep nginx $ journalctl | grep apache2 To display log entries based on their priority level $ journalctl -p warning To display verbose output $ journalctl -o verbose To view information about previous system boots $ journalctl --list-boots To print help options $ journalctl --help regards, T.Dhanasekar

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