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UNIX for Dummies Questions & Answers
Restoring deleted file with rm -rf
Post 302970844 by bakunin on Tuesday 12th of April 2016 12:13:10 PM
04-12-2016
Kudos to drl for his succinct description of how to handle file security. He has it 100% right.
Yes, but this doesn't tell us which filesystem you are running. Possible candidates include "ext2", "ext3", "ext4" (with or without an underlying volume group) and some others.
Essentially: yes. There are some low-level possibilities (see above) to retrieve the content nevertheless, but they all have in common that:
- they need in-depth knowledge of the filesystem involved and are for experts only - try it as a beginner and you are likely to get yourself even deeper into troubles than you are already;
- even then they are not guaranteed to work. Most of these tools are "best effort" and sometimes they work, sometimes they work partly and sometimes they do work not at all;
- the necessity of backups can not be stressed enough and it is a painful (but valuable!) lesson to learn this - unfortunately it seems to be the only way that has a lasting effect. Generations of admins and users have neglected backups and all these generations have been in your shoes once before they started to develop healthy habits. (fwiw: me too ;-) )
You might consider using a desktop environment, like GNOME, KDE or something such. I don't like any of them, but most desktops offer a "waste bin" - a hidden directory of some sorts where "deleted" files and directories go. One can pull them out of there if they were not meant to be deleted. To be honest, I'd rather recommend developing responsible user habits (like double-check if what you type is really what you want), but before that goal is achieved such a "waste bin" might come in handy as a crutch.
I hope this helps.
bakunin
Yes, but this doesn't tell us which filesystem you are running. Possible candidates include "ext2", "ext3", "ext4" (with or without an underlying volume group) and some others.
Quote:
So this means my file is lost, right?- they need in-depth knowledge of the filesystem involved and are for experts only - try it as a beginner and you are likely to get yourself even deeper into troubles than you are already;
- even then they are not guaranteed to work. Most of these tools are "best effort" and sometimes they work, sometimes they work partly and sometimes they do work not at all;
- the necessity of backups can not be stressed enough and it is a painful (but valuable!) lesson to learn this - unfortunately it seems to be the only way that has a lasting effect. Generations of admins and users have neglected backups and all these generations have been in your shoes once before they started to develop healthy habits. (fwiw: me too ;-) )
You might consider using a desktop environment, like GNOME, KDE or something such. I don't like any of them, but most desktops offer a "waste bin" - a hidden directory of some sorts where "deleted" files and directories go. One can pull them out of there if they were not meant to be deleted. To be honest, I'd rather recommend developing responsible user habits (like double-check if what you type is really what you want), but before that goal is achieved such a "waste bin" might come in handy as a crutch.
I hope this helps.
bakunin
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LEARN ABOUT CENTOS
fsadm
FSADM(8) FSADM(8) NAME
fsadm - utility to resize or check filesystem on a device SYNOPSIS
fsadm [options] check device fsadm [options] resize device [new_size[BKMGTEP]] DESCRIPTION
fsadm utility checks or resizes the filesystem on a device. It tries to use the same API for ext2, ext3, ext4, ReiserFS and XFS filesys- tem. OPTIONS
-e, --ext-offline Unmount ext2/ext3/ext4 filesystem before doing resize. -f, --force Bypass some sanity checks. -h, --help Display the help text. -n, --dry-run Print commands without running them. -v, --verbose Be more verbose. -y, --yes Answer "yes" at any prompts. new_size Absolute number of filesystem blocks to be in the filesystem, or an absolute size using a suffix (in powers of 1024). If new_size is not supplied, the whole device is used. DIAGNOSTICS
On successful completion, the status code is 0. A status code of 2 indicates the operation was interrupted by the user. A status code of 3 indicates the requested check operation could not be performed because the filesystem is mounted and does not support an online fsck(8). A status code of 1 is used for other failures. EXAMPLES
Resize the filesystem on logical volume /dev/vg/test to 1000 megabytes. If /dev/vg/test contains ext2/ext3/ext4 filesystem it will be unmounted prior the resize. All [y|n] questions will be answered 'y'. fsadm -e -y resize /dev/vg/test 1000M ENVIRONMENT VARIABLES
TMPDIR The temporary directory name for mount points. Defaults to "/tmp". DM_DEV_DIR The device directory name. Defaults to "/dev" and must be an absolute path. SEE ALSO
lvm(8), lvresize(8), lvm.conf(5), fsck(8), tune2fs(8), resize2fs(8), reiserfstune(8), resize_reiserfs(8), xfs_info(8), xfs_growfs(8), xfs_check(8) Red Hat, Inc LVM TOOLS 2.02.105(2)-RHEL7 (2014-03-26) FSADM(8)