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  • Achieving/maxing out 1GBPS connectivity on a nginx server

    - by Ansell Cruz
    This page (http://www.remsys.com/nginx-on-1gbps) claims that it can max out a 1gbps line using JBOD setup and no raid. Currently I'm on a 1gbps dedicated port and I'm on raid 10 (4x2TB - the disks that comes with 100tb.com servers). Currently I'm only peaking at 500-550mbps. wa% would show something around 20% everytime. I'm looking into maxing out this 1gbps port because I have an unmetered service from them. Do you guys think that the page that I referenced would be better than my current raid setup? Do you guys have any other suggestions on how to max out the performance of this server? TYI.

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  • Best format for backing up data in Blu Ray

    - by Arrieta
    We are in the process of backing up our hard drives to Blu Rays. I am creating tar.gz files and burning them to Blu Ray. Is it possible to use a simple (preferably Python-based) solution for creating images of those tar.gz files, of a predetermined size (to fit in the Blu Ray), and simply burn this images to the disc? Do you have any other approach for creating physical back-up of your hard drives?

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  • Easy shorewall question : allow ips to DNAT

    - by llazzaro
    Hello, At my home network I had a transparent proxy. This is the rule that forward all 80 traffic to my squid3.1 server at DMZ DNAT loc:!10.0.0.126 dmz:172.16.0.198:3128 tcp 80 - !172.16.0.198 Ok, I need to add more ips to avoid transparent proxy. I tried loc:!10.0.0.134,!10.0.0.126...but didnt work (also similars like [ip0,ip1]. I tried to google the answer cant find it (sorry no matches, not searching the right keywords) also I tried to read the docs, but they are really long (and indexes dont help me). Thanks!

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  • Hang while starting several daemons [solved]

    - by Adrian Lang
    I’m running a Debian Squeeze AMD64 server. Target runlevel after boot is runlevel 2, which includes rsyslogd, cron, sshd and some other stuff, but not dovecot, postfix, apache2, etc. The system fails to reach runlevel 2 with several symptoms: The system hangs at trying to start rsyslogd Booting into runlevel 1 works, then login from the console works Starting rsyslogd from runlevel 1 via /etc/init.d/rsyslog hangs Starting runlevel 2 with rsyslogd disabled works But then, logging in via console fails: I get the motd, and then nothing Starting sshd from runlevel 1 succeeds But then, I cannot login via ssh. Sometimes password ssh login gives me the motd and then nothing, sometimes not even this. Trying to offer a public key seems to annoy the sshd enough to not talk to me any further. When rebooting from runlevel 1, the server hangs at trying to stop apache2 (which is not running, so this really should be trivial). Trying to stop apache2 when logged in in runleve 1 does hang as well. And that’s just the stuff which fails all the time. RAM has been tested, dmesg shows no problems. I have no clue. Update: (shortened) output from rsyslogd -c4 -d called in runlevel 1 rsyslogd 4.6.4 startup, compatibility mode 4, module path '' caller requested object 'net', not found (iRet -3003) Requested to load module 'lmnet' loading module '/user/lib/rsyslog/lmnet.so' module of type 2 being loaded conf.c requested ref for 'lmnet', refcount 1 rsylog runtime initialized, version 4.6.4, current users 1 syslogd.c requested ref for 'lmnet', refcount now 2 I can kill rsyslogd with Strg+C, then. /var/log shows none of the configured log files, though. Update2: Thanks to @DerfK I still have no clue, but at least I narrowed down the problem. I’m now testing with /etc/init.d/apache2 stop (without an apache2 running, of course) which hangs as well and looks like an even more obvious failure. After some testing I found out that a file with one single line: /usr/sbin/apache2ctl configtest /dev/null 2&1 hangs, while the same line executed in an interactive shell works. I was not able to further reduce this line while, i. e. every single part, the stream redirections and the commando itself is necessary to reproduce the hang. @DerfK also pointed me to strace which gave a shallow hint about what kind of hang we have here: wait4(-1for the init scripts futex(0xsomepointer, FUTEX_WAIT_PRIVATE, 2, NULL for rsyslogd / apache2 binaries called by the init scripts The system was installed as a Debian Lenny by my hoster in autumn 2011, I upgraded it to Squeeze immediately and kept it up to date with Squeeze, which then used to be testing. There were no big changes, though. I guess I never tried to reboot the system before. Update3: I found the problem. My /etc/nsswitch.conf specified ldap as hosts lookup backup, which is not available at that time of the boot. Relying on dns solely fixes my boot problems.

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  • NIC bonding with two uplinks

    - by Karolis T.
    Is bonding the preferred way of implementing ISP redundancy? In the texts I've seen, bond device has a netmask, gateway of it's own. How can this be obtained if there are two different gateways from two uplinks, which one to choose? Do I need any special routing rules to go with it or does simply configuring separate interfaces (using Debian, /etc/network/interfaces), i.e eth1, eth2 for their corresponding uplinks and bonding them to bond0 handle routing automatically? If I want to NAT client machines, do they use bond device's IP as a gateway? Does the bond0 device is the device that goes into iptables nat rules? Thanks

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  • Make errors when compiling HPL-2.1 on MOSIX-clustered Debian server

    - by tlake
    I'm trying to compile HPL 2.1 on a MOSIX-clustered Debian server, but the make process terminates with errors as seen below. Included are my makefile and two versions of output: one from a standard execution, and one from an execution run with the debug flag. Any help and guidance would be very much appreciated! The makefile: # ---------------------------------------------------------------------- # - shell -------------------------------------------------------------- # ---------------------------------------------------------------------- # SHELL = /bin/bash # CD = cd CP = cp LN_S = ln -s MKDIR = mkdir RM = /bin/rm -f TOUCH = touch # # ---------------------------------------------------------------------- # - Platform identifier ------------------------------------------------ # ---------------------------------------------------------------------- # ARCH = Linux_PII_CBLAS # # ---------------------------------------------------------------------- # - HPL Directory Structure / HPL library ------------------------------ # ---------------------------------------------------------------------- # TOPdir = $(HOME)/hpl-2.1 INCdir = $(TOPdir)/include BINdir = $(TOPdir)/bin/$(ARCH) LIBdir = $(TOPdir)/lib/$(ARCH) # HPLlib = $(LIBdir)/libhpl.a # # ---------------------------------------------------------------------- # - Message Passing library (MPI) -------------------------------------- # ---------------------------------------------------------------------- # MPinc tells the C compiler where to find the Message Passing library # header files, MPlib is defined to be the name of the library to be # used. The variable MPdir is only used for defining MPinc and MPlib. # MPdir = /usr/local MPinc = -I$(MPdir)/include MPlib = $(MPdir)/lib/libmpi.so # # ---------------------------------------------------------------------- # - Linear Algebra library (BLAS or VSIPL) ----------------------------- # ---------------------------------------------------------------------- # LAinc tells the C compiler where to find the Linear Algebra library # header files, LAlib is defined to be the name of the library to be # used. The variable LAdir is only used for defining LAinc and LAlib. # LAdir = $(HOME)/CBLAS/lib LAinc = LAlib = $(LAdir)/cblas_LINUX.a # # ---------------------------------------------------------------------- # - F77 / C interface -------------------------------------------------- # ---------------------------------------------------------------------- # You can skip this section if and only if you are not planning to use # a BLAS library featuring a Fortran 77 interface. Otherwise, it is # necessary to fill out the F2CDEFS variable with the appropriate # options. **One and only one** option should be chosen in **each** of # the 3 following categories: # # 1) name space (How C calls a Fortran 77 routine) # # -DAdd_ : all lower case and a suffixed underscore (Suns, # Intel, ...), [default] # -DNoChange : all lower case (IBM RS6000), # -DUpCase : all upper case (Cray), # -DAdd__ : the FORTRAN compiler in use is f2c. # # 2) C and Fortran 77 integer mapping # # -DF77_INTEGER=int : Fortran 77 INTEGER is a C int, [default] # -DF77_INTEGER=long : Fortran 77 INTEGER is a C long, # -DF77_INTEGER=short : Fortran 77 INTEGER is a C short. # # 3) Fortran 77 string handling # # -DStringSunStyle : The string address is passed at the string loca- # tion on the stack, and the string length is then # passed as an F77_INTEGER after all explicit # stack arguments, [default] # -DStringStructPtr : The address of a structure is passed by a # Fortran 77 string, and the structure is of the # form: struct {char *cp; F77_INTEGER len;}, # -DStringStructVal : A structure is passed by value for each Fortran # 77 string, and the structure is of the form: # struct {char *cp; F77_INTEGER len;}, # -DStringCrayStyle : Special option for Cray machines, which uses # Cray fcd (fortran character descriptor) for # interoperation. # F2CDEFS = # # ---------------------------------------------------------------------- # - HPL includes / libraries / specifics ------------------------------- # ---------------------------------------------------------------------- # HPL_INCLUDES = -I$(INCdir) -I$(INCdir)/$(ARCH) $(LAinc) $(MPinc) HPL_LIBS = $(HPLlib) $(LAlib) $(MPlib) # # - Compile time options ----------------------------------------------- # # -DHPL_COPY_L force the copy of the panel L before bcast; # -DHPL_CALL_CBLAS call the cblas interface; # -DHPL_CALL_VSIPL call the vsip library; # -DHPL_DETAILED_TIMING enable detailed timers; # # By default HPL will: # *) not copy L before broadcast, # *) call the BLAS Fortran 77 interface, # *) not display detailed timing information. # HPL_OPTS = -DHPL_CALL_CBLAS # # ---------------------------------------------------------------------- # HPL_DEFS = $(F2CDEFS) $(HPL_OPTS) $(HPL_INCLUDES) # # ---------------------------------------------------------------------- # - Compilers / linkers - Optimization flags --------------------------- # ---------------------------------------------------------------------- # CC = /usr/bin/gcc CCNOOPT = $(HPL_DEFS) CCFLAGS = $(HPL_DEFS) -fomit-frame-pointer -O3 -funroll-loops # # On some platforms, it is necessary to use the Fortran linker to find # the Fortran internals used in the BLAS library. # LINKER = ~/BLAS LINKFLAGS = $(CCFLAGS) # ARCHIVER = ar ARFLAGS = r RANLIB = echo # # ---------------------------------------------------------------------- Make output: ~/BLAS -DHPL_CALL_CBLAS -I/homes/laket/hpl-2.1/include -I/homes/laket/hpl-2.1/include/Linux_PII_CBLAS -I/usr/local/include -fomit-frame-pointer -O3 -funroll-loops -o /homes/laket/hpl-2.1/bin/Linux_PII_CBLAS/xhpl HPL_pddriver.o HPL_pdinfo.o HPL_pdtest.o /homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/libhpl.a /homes/laket/CBLAS/lib/cblas_LINUX.a /usr/local/lib/libmpi.so /bin/bash: /homes/laket/BLAS: Is a directory make[2]: *** [dexe.grd] Error 126 make[2]: Target `all' not remade because of errors. make[2]: Leaving directory `/homes/laket/hpl-2.1/testing/ptest/Linux_PII_CBLAS' make[1]: *** [build_tst] Error 2 make[1]: Leaving directory `/homes/laket/hpl-2.1' make: *** [build] Error 2 make: Target `all' not remade because of errors. Make -d output: Considering target file `/homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/libhpl.a'. Looking for an implicit rule for `/homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/libhpl.a'. Trying pattern rule with stem `libhpl.a'. Trying implicit prerequisite `/homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/libhpl.a,v'. Trying pattern rule with stem `libhpl.a'. Trying implicit prerequisite `/homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/RCS/libhpl.a,v'. Trying pattern rule with stem `libhpl.a'. Trying implicit prerequisite `/homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/RCS/libhpl.a'. Trying pattern rule with stem `libhpl.a'. Trying implicit prerequisite `/homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/s.libhpl.a'. Trying pattern rule with stem `libhpl.a'. Trying implicit prerequisite `/homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/SCCS/s.libhpl.a'. No implicit rule found for `/homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/libhpl.a'. Finished prerequisites of target file `/homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/libhpl.a'. No need to remake target `/homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/libhpl.a'. Finished prerequisites of target file `dexe.grd'. Must remake target `dexe.grd'. ~/BLAS -DHPL_CALL_CBLAS -I/homes/laket/hpl-2.1/include -I/homes/laket/hpl-2.1/include/Linux_PII_CBLAS -I/usr/local/include -fomit-frame-pointer -O3 -funroll-loops -o /homes/laket/hpl-2.1/bin/Linux_PII_CBLAS/xhpl HPL_pddriver.o HPL_pdinfo.o HPL_pdtest.o /homes/laket/hpl-2.1/lib/Linux_PII_CBLAS/libhpl.a /homes/laket/CBLAS/lib/cblas_LINUX.a /usr/local/lib/libmpi.so Putting child 0x0129a2c0 (dexe.grd) PID 24853 on the chain. Live child 0x0129a2c0 (dexe.grd) PID 24853 /bin/bash: /homes/laket/BLAS: Is a directory make[2]: Reaping losing child 0x0129a2c0 PID 24853 *** [dexe.grd] Error 126 Removing child 0x0129a2c0 PID 24853 from chain. Failed to remake target file `dexe.grd'. Finished prerequisites of target file `dexe'. Giving up on target file `dexe'. Finished prerequisites of target file `all'. Giving up on target file `all'. make[2]: Target `all' not remade because of errors. make[2]: Leaving directory `/homes/laket/hpl-2.1/testing/ptest/Linux_PII_CBLAS' Reaping losing child 0x010ce900 PID 24841 make[1]: *** [build_tst] Error 2 Removing child 0x010ce900 PID 24841 from chain. Failed to remake target file `build_tst'. make[1]: Leaving directory `/homes/laket/hpl-2.1' Reaping losing child 0x00d91ae0 PID 24774 make: *** [build] Error 2 Removing child 0x00d91ae0 PID 24774 from chain. Failed to remake target file `build'. Finished prerequisites of target file `install'. make: Target `all' not remade because of errors. Giving up on target file `install'. Finished prerequisites of target file `all'. Giving up on target file `all'. Thanks!

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  • FreeRADIUS Default Answer

    - by jinanwow
    We are using FreeRADIUS with a MySQL database, authenticating users. We ran into an issue where are MySQL database was slow causing the max number of threads to be reached. The issue with this is, when the server couldn't answer the requests as there were no threads avaiable, it sent the response of Access-Reject to the clients. Our devices cache client connections and periodically checks with the server to see if they should still be allowed or to remove them. The equipment is designed that if there is no response from the server and a client is connected it will remain connected. The issue is, when the radius server is at its max threads, its default answer is to send access-reject (verified via packet capture), however we would like to change the default behavior to just ignore the request (keeping the clients connected). We have fixed the MySQL database issue for now, but I would like to change the default from Access-Reject, to just ignore the client altogeather. I have done research, but not able to find an answer to the question. Thanks in Advance.

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  • Give root password for maintenance

    - by Jevgeni Smirnov
    After entering shutdown now in terminal I get everything running normally and then: All processes ended withing 2 seconds...done INIT: Going single user INIT: Sending processes the TERM signal INIT: Sending processes the KILL signal Give root password for maintenance(or.... I press Ctrl+D, and it shows me login screen Debian. Shutdown through GUI works properly. UPDATE 1 It seems some process hangs. Moreover I'v managed to poweroff server through several retries. Recently i'v installed only ntp and ntpdate. Nothing more. I suppose it might be it conflicting with iptables.

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  • invalid argument in bash script when port is bad

    - by user273689
    When I do this command I get an error when there is something wrong with the eth3. RESC="1234" RESD="1234" RESO="1234" RESC=$(ssh -q vmx@$1 cat /sys/class/net/$2/carrier) RESO=$(ssh -q vmx@$1 cat /sys/class/net/$2/operstate) RESD=$(ssh -q vmx@$1 cat /sys/class/net/$2/dormant) cat: /sys/class/net/eth3/carrier: Invalid argument cat: /sys/class/net/eth3/dormant: Invalid argument How can I use the invalid argument inside the RESC and RESD variable Thanks

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  • NoMachine NX window closes after establishing connection

    - by blackicecube
    I am trying to use nomachine nx server and client. But somehow it doen't work. What happens is the following: Client starts up Client authenticates with Server The NoMachine window appears for 2-4 seconds The NoMachine window exists Somehow a "closeEvent" is sent. Here's what I see in the log file: [Thu Sep 24 11:20:37 2009]: Starting nxcomp with options: 'NX 299 Switch connection to: NX mode: unencrypted options: nx/nx,options=/home/foo/.nx/S-adnws029-1022-7EEF1367361DB2A7F4D9F76B06F4B434/options:1022'. [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor: opened file: [/home/foo/.nx/S-adnws029-1022-7EEF1367361DB2A7F4D9F76B06F4B434/session] [Thu Sep 24 11:20:38 2009]: LoginDialog::ShowConnectionStatus code=[246] str=[Initializing X protocol compression] error=[0] [Thu Sep 24 11:20:38 2009]: ProgressDialog::printNxStatus: [Initializing X protocol compression] [Thu Sep 24 11:20:38 2009]: LoginDialog::ShowConnectionStatus code=[247] str=[Established the display connection] error=[0] [Thu Sep 24 11:20:38 2009]: ProgressDialog::printNxStatus: [Established the display connection] [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: LoginDialog: slotAgentTimer [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: QClipboard: Unknown SelectionClear event received. [Thu Sep 24 11:20:38 2009]: LoginDialog: slotAgentTimer [Thu Sep 24 11:20:38 2009]: LoginDialog: Agent found closing windows... [Thu Sep 24 11:20:38 2009]: LoginDialog: setting automatic reconnection to true. [Thu Sep 24 11:20:38 2009]: Settings::flush [Thu Sep 24 11:20:38 2009]: Settings::flush [Thu Sep 24 11:20:38 2009]: LoginDialog: closeEvent received! [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: NXFileMonitor::readData [Thu Sep 24 11:20:38 2009]: LoginDialog::destructor called begin [Thu Sep 24 11:20:38 2009]: LoginDialog: stopAllTimers [Thu Sep 24 11:20:38 2009]: LoginDialog: stopProgressTimer [Thu Sep 24 11:20:38 2009]: Utility::getPreferencesFile: 'nxclient' - '/home/foo/.nx/config/nxclient.cfg' [Thu Sep 24 11:20:38 2009]: Settings::flush [Thu Sep 24 11:20:38 2009]: Called destructor for protocol class [Thu Sep 24 11:20:38 2009]: LoginDialog::destructor called end Anyone with a helpful idea?

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  • File system concepts (df command)

    - by mkab
    I'm finding it difficult to understand some stuffs about the df command. Suppose I type df and I have the following output Filesystem 1k-blocks Used Avail Capacity Mounted on /dev/da0s1 some number some number number percentage /win /dev/da0s2 some number some number number percentage /win/home /dev/da0s3a some number some number number percentage / devfs some number some number number percentage /dev /dev/da0s3g some number some number number percentage /local /dev/da0s3h some number some number -number 102% /reste /dev/da0s3d some number some number number percentage /tmp /dev/da1s3f some number some number number percentage /usr /dev/da1s3e some number some number number percentage /var /dev/da1s1a some number some number number percentage /public Are the answers to the following questions correct? How many physical drives do I have? Ans: 2. da0s1 and da1s1 How many physical partitions on each disk? Ans: 8 for da0s1 and 1 for da1s1 How many BSD partition on each physical partition Ans: Impossible to determine. We have to use the -T to determine its type How is it possible for the file system /dev/da0s3h filled at 102%? And where is this overflowed data written?Ans: I have no idea for this one Thanks.

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  • SSL error: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch

    - by Tiffany Walker
    ERROR: SSL error: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch STEPS: openssl genrsa -out SITE.TLD.key 2048 openssl req -new -key SITE.TLD.key -out SITE.TLD.csr (send CSR to SSL site to sign) add CERT to SITE.TLD.crt add CA to SITE.TLD.ca chained them: cat SITE.TLD.crt SITE.TLD.ca > chained.cert Any Idea what I am doing wrong? I am using LiteSpeed HTTPd

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  • Is there a server distro with the capability of syncing live data to multiple machines?

    - by Adam Hart
    Scenario: I have a main server that is used for pagebuilding/storing master data, and is accessed by a few clients on site. This company also has multiple branches with their own server that that connect to locally, but need to work with all the same data, and have it synchronized across all servers in real (or close) time. Is there a way/specific server OS that can sync live data across all of these servers? These servers would also need to be able to: Configure AFP, FTP, CIFS, SMB Continue to host their web server and database server in a Microsoft environment, but move the file server off to commodity hardware Just wondering if this is even possible.

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  • Grant HTTP access based on unix user group

    - by Sander Marechal
    Is it possible to grant network access or HTTP access based on a user's group? At my company we want to set up an internal composer server using Satis to manage packages for the projects we write (e.g. on repository.mycompany.com), with the packages themselves in our SVN server (svn.mycompany.com). We have several webservers with many different users on them. Some users should be able to reach the composer and SVN server. Some should not. Users that should be able to reach these servers all belong to the same group. How can I set up Apache on the Composer and SVN server to only grant access to those users in that group? Alternatively, can I set up the webservers in such a way that only users from that group are able to make a connection to our Composer and SVN servers? The best thing we have come up with so far is using SSL client certificates. We simply place a client certificate on all servers which can be used to access Composer and SVN. Only the right usergroup will have read access to the certificate. A bit clunky but it may work. But I'm looking for something better.

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  • Calculate minimum ext3 partition size for certain amount of data

    - by Daniel Beck
    These following ext3 partitions contain identical data. As we can see, the larger the partition size, the more space is required for the same files: Filesystem 1K-blocks Used Available Use% Mounted on /dev/loop11 3965777 561064 3199964 15% [...] /dev/loop19 573029 543843 29186 95% [...] Filesystem Size Used Avail Use% Mounted on /dev/loop11 3.8G 548M 3.1G 15% [...] /dev/loop19 560M 532M 29M 95% [...] Filesystem Inodes IUsed IFree IUse% Mounted on /dev/loop11 1024000 1656 1022344 1% [...] /dev/loop19 1024000 1656 1022344 1% [...] I start with a partition of fixed size that possibly wasted a lot of space and I want to create a partition that is able to hold that data but with (almost) minimal size. How can I reliably calculate that minimal partition size needed for storing a certain amount of data? The amount of data changes over time, and I need to automate these calculations.

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  • Heartbeat won't start up from a cold boot when a failed node is present

    - by Matthew
    I currently have two ubuntu servers running Heartbeat and DRBD. Let's say one node is down... The servers are directory connected with a 1000Mbps cross over cable on eth1 and have access to a IP camera LAN on eth0 The node that is still functioning won't start up heartbeat and provide access to the drbd resource. I have to manually restart heartbeat by "sudo service heartbeat restart" to get everything up and running. How can I get it to start fine from a cold start? Here is the my ha.cf and some material from the syslog... If I'm missing any information that might be of some help. http://pastebin.com/rGvzVSUq <--- Syslog http://pastebin.com/VqpaPSb5 <--- ha.cf

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  • Migrate data from one server to another using rsync

    - by Leonid Shevtsov
    I'm moving from one VPS to another, and I figured that the simplest way to transfer data would be rsync. However, the data is owned by a user, www-data, which doesn't have ssh privileges, and I'd like it to be owned by the same (named) user on the target machine. Obviously I need all file permissions preserved. I have SSH access via another user with sudo privileges on both machines. Is this possible to do this with rsync?

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  • Using find and tar with files with special characters in the name

    - by Costi
    I want to archive all .ctl files in a folder, recursively. tar -cf ctlfiles.tar `find /home/db -name "*.ctl" -print` The error message : tar: Removing leading `/' from member names tar: /home/db/dunn/j: Cannot stat: No such file or directory tar: 74.ctl: Cannot stat: No such file or directory I have these files: /home/db/dunn/j 74.ctl and j 75. Notice the extra space. What if the files have other special characters? How do I archive these files recursively?

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  • Estimating compressed file size using a list parameter

    - by Sai
    I am currently compressing a list of files from a directory in the following format: tar -cvjf test_1.tar.gz -T test_1.lst --no-recursion The above command will compress only those files mentioned in the list. I am doing this because this list is generated such that it fits a DVD. However, during compression the compression rate decreases the estimated file size and there is abundant space left in the DVD. This is something like a Knapsack algorithm. I would like to estimate the compressed file size and add some more files to the list. I found that it is possible to estimate file size using the following command: tar -cjf - Folder/ | wc -c This command does not take a list parameter. Is there a way to estimate compressed file size? I am also looking into options like perl scripts etc. Edit: I think I should provide more information since I have been doing a lot of web search. I came across a perl script(Link)that sort of emulates the Knapsack algorithm. The current problem with the above mentioned script is that it splits the files in their original state. When I compress the files after splitting them, there are opportunities for adding more files which I consider to be inefficient. There are 2 ways I could resolve the inefficiency: a) Compress individual files and save them in a directory using a script. The compressed file could provide a best estimate. I could generate a script using a folder of compressed files and use them on the uncompressed ones. b) Check whether the compressed file's size is less than the required size. If so, I should keep adding files until I meet the requirement. However, the addition of new files to the compressed file is an optimization problem by itself.

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  • How restore back up email files in qmail

    - by Maysam
    I have problem with restoring some old backup mail files in a mail server that uses qmail. The problem is, when I copy a new email file to the /cur directory, the number of emails in front of inbox increases, but when I click on the inbox, I don't see the newly copied email. I can only see the old emails. I also deleted maildirsize and courierimapuiddb files and they where automatically created again, but it didn't help and I cannot still see the email in my inbox. Is there something I am missing? How can I restore the backed up email files? Please note that when I copy the email files in /.sent-mail/cur directory, they are all displayed in my sent box, but that doesn't happen for inbox files in /cur directory.

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  • How to report a bug against Ubuntu's upgrade process?

    - by Kim
    I just upgraded to lucid and discovered a nasty bug. It prevents the system from booting and took me hours to resolve. Now I'd like to report it along with the workaround I found. The only problem is: Where? Other such bugs have been filed against "update-manager", but that's just the GUI calling some scripts which do the real work. so what do I do? What should I substitute for XYZ in ubuntu-bug XYZ ?

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  • How to copy symlinks to target as normal folders

    - by Marek
    Hi i have a folder with symlinks: marek@marek$ ls -al /usr/share/solr/ razem 36 drwxr-xr-x 5 root root 4096 2010-11-30 08:25 . drwxr-xr-x 358 root root 12288 2010-11-26 12:25 .. drwxr-xr-x 3 root root 4096 2010-11-24 14:29 admin lrwxrwxrwx 1 root root 14 2010-11-24 14:29 conf -> /etc/solr/conf i want to copy it to ~/solrTest but i want to copy files from symlink as well when i try to cp -r /usr/share/solr/ ~/solrTest i will have symlink here: marek@marek$ ls -al ~/solrTest razem 36 drwxr-xr-x 5 root root 4096 2010-11-30 08:25 . drwxr-xr-x 358 root root 12288 2010-11-26 12:25 .. drwxr-xr-x 3 root root 4096 2010-11-24 14:29 admin lrwxrwxrwx 1 root root 14 2010-11-24 14:29 conf -> /etc/solr/conf

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