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Thread: FTP issue after upgrading from SLES 11 SP4 to SLES 12 SP2

  1. #1

    FTP issue after upgrading from SLES 11 SP4 to SLES 12 SP2

    On September 5th, I upgraded one of my database servers from SLES 11 SP4 to SLES 12 SP2. I performed an upgrade in place.

    The database admin let me know that he has been using a script (for years) to backup the DB2 database and FTP the backup to another server, if the backup is successful. The FTP is now failing with message
    Code:
    Wrapper for lftp to simulate compatibility with lukemftp
    FTP failed.  Return Code: 8
    I chose the upgrade in place option to preserve all of the system settings (ssh keys, config files, etc.).

    If I attempt to initiate an FTP from this same server I get "Wrapper for lftp to simulate compatibility with lukemftp" prior to the prompt for my login name.

    If I attempt the initiate an FTP from a SLES 11 server I get a 'Connected to ..." message followed by that systems' ftp_banner.

    What could be the cause of this issue?


    Harley

  2. #2

    Re: FTP issue after upgrading from SLES 11 SP4 to SLES 12 SP2

    Just to be clear, you are okay with sending database information across
    the wire without any kind of encryption? There are so many built-in,
    secure, ubiquitous ways to transfer data using encryption that this makes
    me cringe. Maybe the data mean nothing in any security context, but that
    is so rare these days. Anyway....

    A whole new major release (eleven (11) vs. twelve (12)) of the OS could
    mean a lot of changes. I suppose I would start by figuring out what is
    running, if the changelog documents the changes (probably does if you go
    back far enough), and then find a new way to work with it, maybe by
    dropping it and using something else entirely (scp/sftp/etc.). A few
    commands that sometimes help:

    Code:
    alias | grep commandHere  #see if an alias is involved
    \commandHere  #the backslash at the beginning disables alises
    
    which commandHere  #find the path to the command, and then:
    rpm -qf $(which commandHere)  #find the owning package
    rpm -qif $(which commandHere)  #get package Information
    rpm -q --changelog -f $(which commandHere)  #packge changelog info

    --
    Good luck.

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  3. #3

    Re: FTP issue after upgrading from SLES 11 SP4 to SLES 12 SP

    Hi Ab.

    The data is being transferred on a private network within the data center. My Linux servers run under z/VM on the same mainframe that the data is being transferred to. The virtual servers don't have access to tape so the database backups are being FTP'ed to tape on a z/OS system. My clients' IT Governance team is VERY security conscious and approves of this.

    I found that the FTP command on SLES 11 is a symbolic link to program pftp. Program pftp doesn't exist on SLES 12. The FTP command on SLES 12 is a symbolic link to program lftp.

    I've spent the time before and after my first post searching Google and can't seem to figure out lftp. I will go and find the doc files what has changed with SLES 12 (and the SP's0 to see if that mentions anything.


    Harley

  4. #4

    Re: FTP issue after upgrading from SLES 11 SP4 to SLES 12 SP2

    Could you post the commands you are/were using before, so we can try to
    help come up wit equivalents for lftp? I presume you are trying to put
    files elsewhere (on another server) and Google gave me some
    promising-looking hits when I searched for 'lftp put file'.

    --
    Good luck.

    If you find this post helpful and are logged into the web interface,
    show your appreciation and click on the star below.

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    forum as I do not use the web interface often.

  5. #5

    Re: FTP issue after upgrading from SLES 11 SP4 to SLES 12 SP

    We were doing the standard FTP put command to call the file something different on the mainframe:
    Code:
    put filename.whatever mainframe-name
    I found that the 'put' command under lftp requires switch '-o' between the filenames. A co-worker is performing the tests.

    Thank you.

  6. #6
    Franz Sirl NNTP User

    Re: FTP issue after upgrading from SLES 11 SP4 to SLES 12 SP2

    Am 2017-09-18 um 20:14 schrieb x0500hl:
    > I found that the FTP command on SLES 11 is a symbolic link to program
    > pftp. Program pftp doesn't exist on SLES 12. The FTP command on SLES
    > 12 is a symbolic link to program lftp.


    pftp is neither a SLES11 nor a SLES12 standard package. And on both 11
    and 12 ftp is normally a symbolic link to lftp_wrapper (via
    /etc/alternatives). So I guess someone installed pftp manually and
    changed the symbolic link? And the SLES12 install reverted it back to
    the default?

    Franz.


  7. #7

    Re: FTP issue after upgrading from SLES 11 SP4 to SLES 12 SP2

    Looks like you have it figured out; thanks for posting back your results.

    --
    Good luck.

    If you find this post helpful and are logged into the web interface,
    show your appreciation and click on the star below.

    If you want to send me a private message, please let me know in the
    forum as I do not use the web interface often.

  8. #8

    Re: FTP issue after upgrading from SLES 11 SP4 to SLES 12 SP

    Quote Originally Posted by Franz Sirl View Post
    Am 2017-09-18 um 20:14 schrieb x0500hl:
    > I found that the FTP command on SLES 11 is a symbolic link to program
    > pftp. Program pftp doesn't exist on SLES 12. The FTP command on SLES
    > 12 is a symbolic link to program lftp.


    pftp is neither a SLES11 nor a SLES12 standard package. And on both 11
    and 12 ftp is normally a symbolic link to lftp_wrapper (via
    /etc/alternatives). So I guess someone installed pftp manually and
    changed the symbolic link? And the SLES12 install reverted it back to
    the default?

    Franz.
    Franz,

    I appreciate the response, thank you.

    We did a clean install of SLES 11 (base) shortly after it was released and never installed a different package. I found that /usr/bin/pftp is part of package lukemftp-1.5-725.17 (command "rpm -qf /usr/bin/pftp") which was installed "Wed Dec 30 08:04:59 2009". This date is the oldest date for command "rpm -qa --last", and there are many screens of rpm files that were installed on that date.

    On one of my SLES 11 systems, which were all cloned from a single golden-image and were upgraded from base to SP1, SP2, SP3, to SP4, the /usr/bin directory contains (all files containing 'ftp'):
    Code:
    lrwxrwxrwx 1 root root     21 Dec 30  2009 ftp -> /etc/alternatives/ftp
    -rwxr-xr-x 1 root root    598 May 28  2009 ftp-rfc
    -rwxr-xr-x 1 root root  10536 Jun  9  2015 ftpatchk
    -rwxr-xr-x 1 root root  86880 Jun 29  2011 opieftpd
    -r-xr-xr-x 1 root root 250288 Feb 21  2009 pftp
    -rwxr-xr-x 1 root root   8803 May 28  2009 rftp
    -rwxr-xr-x 1 root root 137752 Oct  5  2015 sftp
    /etc/alternatives contains:
    Code:
    lrwxrwxrwx   1 root root    13 Dec 30  2009 ftp -> /usr/bin/pftp
    lrwxrwxrwx   1 root root    29 Dec 30  2009 ftp.1 -> /usr/share/man/man1/pftp.1.gz
    lrwxrwxrwx   1 root root    15 Nov 22  2015 ld -> /usr/bin/ld.bfd
    lrwxrwxrwx   1 root root    27 Nov 22  2015 libblas.so.3 -> /usr/lib64/libblas.so.3.4.2
    lrwxrwxrwx   1 root root    29 Nov 22  2015 liblapack.so.3 -> /usr/lib64/liblapack.so.3.4.2
    lrwxrwxrwx   1 root root    15 Aug 12  2012 vim -> /bin/vim-normal
    lrwxrwxrwx   1 root root    36 Aug 12  2012 xulrunner -> /usr/lib64/xulrunner-1.9.2/xulrunner

    For anyone interested, the FTP commands that were used prior to SLES 12 follow. These commands are almost the same as what I would specify in a Windows Command prompt to FTP a file to the same server.
    Code:
    ftp -nv $HOST <<END_SCRIPT 2>&1 | tee $STDOUTFILE
    quote USER $USER
    quote PASS $PASSWD
    site unit=cart retpd="$RETENTION"
    bin
    put "$FULLFILEIN" '$FILEOUT'
    quit
    END_SCRIPT
    The FTP commands that now perform the same function with lftp:
    Code:
    ftp  <<END_SCRIPT 2>&1 | tee $STDOUTFILE
    lftp-open -u $USER,$PASSWD $HOST
    site unit=cart retpd="$RETENTION"
    bin
    cd \'$FILEOUTDIR\'
    put "$FULLFILEIN" -o '$FILEOUT'
    quit
    END_SCRIPT

    Note that I could not find any mention of lftp becoming the default in any of the SLES 12 Release Notes (SLES 12 , SLES 12 SP1, and SLES 12 SP2). This is one of two changes to SLES 12 (that I am aware of) that isn't documented in the Release Notes.

    Harley

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