BG 3.25
As the ignorant act out of attachment to action, O Bharata, so should the wise act without attachment, wishing for the welfare of the world.
BG 18.19
Knowledge, action, and actor are declared in the science of the Gunas (Sankhya philosophy) to be of three kinds only, according to the distinction of the Gunas. Of these, hear duly.
BG 14.20
The embodied one, having crossed beyond these three Gunas from which the body is evolved, is freed from birth, death, decay, and pain, and attains immortality.
Author: steini
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Words of wisdom
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Linux permissions in three seconds
r w x
4 2 1
7=r+w+x
6=r+w
5=r+x
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Modify image, command line
Shrink partition with resize2fs
'resize2fs' to get the desired filesystem size
'tune2fs -l' to determine the filesystem look for 'Block size' and 'Block count'
tune2fs -l /dev/sdb1
'parted' to determine the partition's 'Start' sector (first set 'unit' to 's'), unit s,
Compute the partition 'End' sector:
'End' = 'Start' + (('Block size' * 'Block count') / 512) - 1
'parted' to resize the partition using the computed 'End' value (first set 'unit' to 's')
'parted /dev/sdX resizepart 2 <new_last_sector_number>s
(See 'man resize2fs' and 'man parted' for command details)
blkid, vim /etc/fstab, systemctl daemon-reload, lsblkresize2fs /dev/sdb1 250G tune2fs -l /dev/sdb1 - Block count: 65536000, First block: 0, Block size: 4096
qalc
2048 + ((4096 × 65536000) / 512) − 1 = 524290047
parted
parted /dev/sdb, unit s, print, (parted) resizepart 1 524290047, e2fsck -f /dev/sdb1
modify image
inspection; fdisk -l raw_img_file.img mount -o loop offset=1048576(start sector*512) raw_img_file.img /mnt/img umount /mnt/img, Add space to the image; df -h /mnt/img parted raw_img_file.img print free quit dd if=/dev/zero bs=1M count=512 >> raw_img_file.img pated raw_img_file.img, unit s, resizepart 1 2444222s (last sector 's') print free kpartx -av raw_img_file.img ls /dev/mapper e2fsck -f -y -v -C 0 /dev/mapper/loop0p1 resize2fs -p /dev/mapper/loop0p1 kpartx -d raw_img_file.img umount /mnt/img kpartx -d raw_img_file.img kpartx -av raw_img.file.img, mount /dev/mapper/loop0p1 /mnt/img chroot short version mount -t proc proc /mnt/img/proc mount -t sysfs sys /mnt/img/sys mount -o bind /dev /mnt/img/dev mount -t devpts pts /mnt/img/dev/pts chroot /mnt/img exit umount /mnt/img/dev/pts umount /mnt/img/dev umount /mnt/img/sys umount /mnt/img/proc umount /mnt/img kpartx -d raw_img_file.img
shrinking .img
umount /dev/sdc1
umount /mnt/sdc2
dd if=/dev/sdc of=my_image.img
modprobe loop losetup -f losetup /dev/loop0 my_image.img prtprobe /dev/loop0 gparted /dev/loop0 resize, losetup -d/dev/loop0 (deattach) find last sector fdisk -l my_image.img The last block was 9181183 and block-numbers start at 0. That means we need (9181183+1)*512 bytes. truncate --size=$[(9181183+1+33)*512] my_image.img,
– 33 extra sectors are needed for the backup GPT partition tablem use gdisk my_image.img and then use the w command to repair the partition table.– if GPT backup partition table at the end of the disk was already removed, there is fix. Add 33 sectors with dd if=/dev/zero bs=512 count=33 >> myimage.img. And fix it with gdisk myimage.img and use w command.
or parted /dev/loop0, print, unit s,
resizepart 2(1) 111111s (to sector), quit -
Cryptsetup open, mount, umount, close
Short version of cryptsteup open, mount, umount, cryptsetup close
- blkid | grep crypto cryptsetup open /dev/nvme0n1p2 secret mount /dev/mapper/secret /mnt/secret umount /mnt/secret crypstsetup close secret
Crypt partition with cryptsetup; * cryptsetup loksFormat /dev/sdd2 <-- format drive * cryptsetup open /dev/sdd2 luks * mkfs.ext4 /dev/mapper/luks * crypsteup mount /dev/mapper/luks /mnt/luks * crypsetup open /dev/sdd2 luks * cryptsetup status luks * umount /mnt/luks * cryptsetup close luks * crypsetup luksChangeKey /dev/sdd2
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Rsync –include-from=’include_exclude_file’
Include and exclude with rsync -avv –include-from.
So here is a ultra short howto. First have to be the pluses (include) of the map end then the minuses (exclude).
rsync -avv –include-from=’rsync_home_apr25′ /home/bob/ /media/backup/experiment/
rsync_home_apr25
+ include_file1 + include_file2 + include_map/ + .config/foot + .config/mpv - .config/* + map/ + map/under_map1 + map/under_map2 - map/* - /*
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Words of wisdom
All of humanity’s problems stem from man’s inability to sit quietly in a room alone.
— Blaise Pascal
Be still and know that I am god.
— Psalm 46:10