cksum entire dir??
kline at thought.org
Wed Sep 12 22:21:13 UTC 2012
On Wed, Sep 12, 2012 at 02:11:05PM -0400, Karl Vogel wrote:
> >> On Tue, 11 Sep 2012 14:38:04 -0700, Gary Kline wrote:
> G> I'm trying to checksum directories as I move them around. ive read the
> G> man page for sum and cksum ... or maybe skimmed them. no joy. anybody
> G> know of a utility to do this? I've got files that are decades old...
> I wouldn't use CRC32 to check file integrity; use SHA1 or MD5 at the
> very least. See http://home.comcast.net/~bretm/hash/8.html for details.
[root at ethos klinebak]# yum install sha1
Loaded plugins: langpacks, presto, refresh-packagekit
adobe-linux-x86_64 | 951 B 00:00
rpmfusion-free-updates | 3.3 kB 00:00
rpmfusion-nonfree-updates | 3.3 kB 00:00
updates/metalink | 18 kB 00:00
No package sha1 available.
Error: Nothing to do
[root at ethos klinebak]#
see, nothing; I tried to install sha256 as well. zip. but md5sum
I have, so that will serve.
> >> On Tue, 11 Sep 2012 18:17:25 -0700,
> >> Colin Barnabas <colin.barnabas at gmail.com> replied:
> Are you by any chance a "Dark Shadows" fan?
I havent a clue what that is; if it's a tv show, no.
same w/ movies.
> C> This works for me:
> C> $ find foo/ -type f -print0 | xargs -0 md5 >> foo.md5
> I do something similar when copying files to a backup server; it's not
> unheard of for SSH to drop a session or a drive to have a bad spot.
> An easy-to-automate way is: get a list of files, use the hash of your
> choice to generate signatures, sort the signature file by the hash, and
> then get the hash value of the signature file. Here's an example using
> my bin directory:
> me% ls
> aline dir hist makecfg mx ro
> authlog diskused isodate makekey mylook setperm
> avg dline kernlog makepass n32 sha
> buildenv dnslog lastdom mb n64 sshlog
> cline dosrc linkdups md5path nr sulog
> cmdlog dot ll memuse ntplog syslog
> conlog dp lsl mgrep pathinfo tc
> core f lslm mk ping tcv
> cronlog fixhist lsn mkdtree plog tl
> daemonlog fmt lsnm mkproto pwgen tr0
> dblog getperm lss mkrcs r tx
> dbrun google lssm mongolog rand vi
> dh haval lst month range zp
> dig help2man lstm mv2inode
> me% find . -type f -print0 | xargs -0 md5 -r | sort > /tmp/dir.md5
> me% cat /tmp/dir.md5
> 01328aeb4fd0eb3d998f4d7ad407a73f ./setperm
> 017d6d622fb93bf7f23c0fb7b96b16eb ./core
> 0287839688bd660676582266685b05bd ./mkrcs
> 0b97494883c76da546e3603d1b65e7b2 ./pwgen
> ddbed53e795724e4a6683e7b0987284c ./authlog
> ddbed53e795724e4a6683e7b0987284c ./cmdlog
> ddbed53e795724e4a6683e7b0987284c ./conlog
> ddbed53e795724e4a6683e7b0987284c ./cronlog
> ddbed53e795724e4a6683e7b0987284c ./daemonlog
> ddbed53e795724e4a6683e7b0987284c ./kernlog
> ddbed53e795724e4a6683e7b0987284c ./ntplog
> ddbed53e795724e4a6683e7b0987284c ./sulog
> ddbed53e795724e4a6683e7b0987284c ./syslog
> fdff1fd84d47f76dbd4954c607d66714 ./dbrun
> ff5e24efec5cf1e17cf32c58e9c4b317 ./tr0
> The *log files are hard-linked, hence the duplicate MD5 values.
> me% md5 -r /tmp/dir.md5
> fdc34a5a5df7807d4fc45739d2d3039f /tmp/dir.md5
> If I copy these files elsewhere, I can repeat the steps and just compare
> the final hash; if it's anything other than 'fdc34...3039f', something's
well, the full story is my new system admin left my desktop 3/4 or 7/8
or 15/16ths in shardes. I have to-be-made-whole files/dirs in
/home/kline. copies from two primary computers are scattered all
over. I/ it won't be the-end if I lose a few favorite songs, but
I wantto make certain that my devel and journal and writing dirs
and a few others are md5sum flawless.
thanks for youw howto across machines, karl. I'll save this in my
howto file. my present desktop is temp; I'll turn it into a server
---just-in-case. then will use my server for backups. gotta
> Karl Vogel I don't speak for the USAF or my company
> When In Doubt, Empty The Magazine --bumper-sticker seen on military base
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