Weird problem with cp command on a Synology Post: 302499442

Sponsored Content

Top Forums UNIX for Dummies Questions & Answers Weird problem with cp command on a Synology Post 302499442 by Pokersut on Thursday 24th of February 2011 04:01:15 PM

02-24-2011

Registered User

Weird problem with cp command on a Synology

Hi.

First post, and Linux newbie, so maybe I'm missing something obvious:

I have a Synology NAS that is run by a Linux distribution (which?). I have had an external hard drive connected to the NAS for making backups using Synology's backup application Time Backup.

Time Backup is based on rsync, so it creates incremental backups with all identical files being replaced by symbolic links.

I had to send the external hard drive in for repair, but before I did, I wanted to make a copy of all the backup data, so I wouldn't lose all my backup versions if they had to format the drive.

I found out, however, that when I tried to copy the drive, all the symbolic links were being followed, so I quickly used up all the space on the drive I wanted to copy the data to.

After a little research I found a solution with this command, run from a terminal (I SSH into the NAS using WinSCP):

Code:

cp -R -P /volumeSATA/satashare/TimeBackup /volume1/public

This effective copied all the backup data, including all the symbolic links and not the files that they pointed to, to a folder 'TimeBackup' in the directory 'public'.

Now I have my external hard disk back, and sure enough, it's been formatted, so now I need to put the backup data back on the drive.

This should be easy enough, I just need to switch the two locations from the command above around, and everything should be copied back - but no! When I run this command:

Code:

cp -R -P /volume1/public/TimeBackup /volumeSATA/satashare

the data starts copying alright, BUT the symbolic links are followed, so the disk fills up.

Am I doing something wrong? Shouldn't the "-P" parameter prevent the links from being followed??

---------- Post updated at 10:01 PM ---------- Previous update was at 05:34 PM ----------

Quote:

Originally Posted by Pokersut

Time Backup is based on rsync, so it creates incremental backups with all identical files being replaced by symbolic links.

Correction: It uses hard links, not symbolic links!

Pokersut

View Public Profile for Pokersut

Find all posts by Pokersut

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Weird Problem???

I have a problem I don't understand... I am trying to declare a variable, and then output the results of that variable, couldn't be simpler #!/bin/ksh VAR='Oranges' if then echo "Found Lemons" elif then echo "Found Oranges" fi The output shouold clearly be "Found Oranges", but...

2. Solaris

Weird crontab problem

Greetings To All! I am running Solaris 10 in a sparc environment. Here is the deal: In /var/spool/cron/crontabs, there is a cron user named "sys". If I do a crontab -l sys, it returns: # 0 * * * 0-6 /usr/lib/sa/sa1 # 20,40 8-17 * * 1-5 /usr/lib/sa/sa1 # 5 18 * * 1-5 /usr/lib/sa/sa2...

3. Shell Programming and Scripting

Weird date difference problem

I am trying to find the difference in days between 2 dates. I have to extract the 1st date from a filename, which i did using the awk command. I have to compare this date to today's date and if the difference is greater than 30 days, do something, else do something else. This is what i wrote...

4. Shell Programming and Scripting

Weird Variable Evaluation problem

Hi Guys.. I have a script which is: #!/bin/ksh for file in `grep qtc $PIC_SHS/xback00.ksh |cut -d"=" -f2` do ls $file cp $file ./ done output of grep is $ grep qtc $PIC_SHS/xback00.ksh |cut -d"=" -f2 $PIC_BIN/XPBACKRC0.qtc $PIC_BIN/XPBACK000.qtc $PIC_BIN/XPBACKSS0.qtc...

5. UNIX for Advanced & Expert Users

Really weird delete problem

Hi, I've Ubuntu 8.04, and it has some files that I just cannot delete. I've tried everything, inode, fsck etc. Here is what the ls -li outputs root@ubuntu:/home/luser/.local/share/Trash/files/junk# ls -l ls: cannot access TRUNK_: No such file or directory ls: cannot access 2006_output.mv:...

6. Infrastructure Monitoring

Weird dependency problem!

Hi, I want to install net-snmp-devel package but i have following dependecy problem. It's very odd, i don't get it. One of packages is depended on the other one, the other one is depended on the previous one as well. :S :S Could you help me please? Here are the steps: # ls -l total...

7. Shell Programming and Scripting

awk weird problem.

awk 'BEGIN{print 1.2.3.4}' 1.20.30.4 Can anyone explain why has extra "0" in the IP address?

8. Programming

A weird problem with POSIX function

Hi all, Sorry for the title because I didn't find a proper name for it. My question is about POSIX functions, such as timer_create(), mq_open() and pthread_create(). void test_queue() { struct mq_attr attr; attr.mq_maxmsg = 10; attr.mq_msgsize = 64; mq_unlink("/my_test_queue");...

9. UNIX for Dummies Questions & Answers

Weird problem with join command

I have a weird issue going on with the join command... I have two files I am trying to join...here is a line from each file with the important parts marked in red: file1: /groupspace/ccops/cmis/bauwkrcn/commsamp_20140315.txt,1 file2:...

10. Shell Programming and Scripting

Weird awk problem

Hi, I have a simple awk script: BEGIN{} { $a=$2-$1; print $a } END{if(NR==0){ print "0" } } to which I provide the following input 2.9 14 22.2 27

LEARN ABOUT CENTOS

radtest

RADTEST(1)							 FreeRADIUS Daemon							RADTEST(1)

NAME

       radtest - send packets to a RADIUS server, show reply

SYNOPSIS

       radtest [-d raddb_directory] [-t pap/chap/mschap] [-x ] [-4 ] [-6 ] user password radius-server nas-port-number secret [ppphint] [nasname]

DESCRIPTION

       radtest	is  a  frontend to radclient(1). It generates a list of attribute/value pairs based on the command line arguments, and feeds these
       into radclient. It's a fast and convenient way to test a radius server.

OPTIONS

       -d raddb_directory
	      The directory that contains the RADIUS dictionary files. Defaults to /etc/raddb.

       -t pap/chap/mschap/eap-md5
	      Choose the authentiction method to use.  e.g. "-t pap", "-t chap", "-t mschap", or "-t eap-md5",.  Defaults to "pap".  Using EAP-MD5
	      requires that the "radeapclient" program is installed.

       -x     Enables debugging output for the RADIUS client.

       -4     Use NAS-IP-Address for the NAS address (default)

       -6     Use NAS-IPv6-Address for the NAS address (default)

       user   Username to send.

       password
	      Password of the user.

       radius-server
	      Hostname or IP address of the radius server. Optionally, you may specify a port by appending :port

       nas-port-number
	      The  value  of  the NAS-Port attribute. Is an integer between 0 and 2^31, and it really doesn't matter what you put here. 10 will do
	      fine.

       secret The shared secret for this client.

       ppphint
	      If you put an integer > 0 here, radtest (or actually radclient) will add the attribute Framed-Protocol = PPP to the request packet.

       nasname
	      If present, this will be resolved to an IP address and added to the request packet as the NAS-IP-Address	attribute.  If	you  don't
	      specify it, the local hostname of the system will be used.

SEE ALSO

       radiusd(8), radclient(1).

AUTHOR

       Miquel van Smoorenburg, miquels@cistron.nl.

								   5 April 2010 							RADTEST(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Weird Problem???

Discussion started by: danhodges99

2. Solaris

Weird crontab problem

Discussion started by: RobSand

3. Shell Programming and Scripting

Weird date difference problem

Discussion started by: meeraKh

4. Shell Programming and Scripting

Weird Variable Evaluation problem

Discussion started by: vamsi.coe