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Welcome to my blog, which was once a mailing list of the same name and is still generated by mail. Please reply via the "comment" links.

Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

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© 2006-2017 Andrew Cooke (site) / post authors (content).

Resizing Cryptmount File System

From: andrew cooke <andrew@...>

Date: Wed, 11 Aug 2010 09:36:23 -0400 

If you have an encrypted loopback file system that uses cryptmount you can
resize (enlarge) it by doing the following:

- Add extra padding by:
    dd if=/dev/zero bs=... count=... >> file
  where file is the file that contains the file system (unmounted)

- Mount the file system (this also creates loopback device etc):
    cryptmount name

- Unmount the file system:
    sudo su
    umount /dev/mapper/....

- Check and resize the file system:
    e2fsck -f /dev/mapper/...
    resize2fs /dev/mapper/...

- And remount
    mount /dev/mapper/... path

This is based on the information at
http://wiki.archlinux.org/index.php/System_Encryption_with_LUKS_for_dm-crypt#Resizing_the_loopback_filesystem
but that assumes a LUKS file system.

Andrew

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