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Search found 12 results on 1 pages for 'ojblass'.

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• What exactly is a proxy?

  - by ojblass

  What does a proxy do and how is it related to getting out of my network to the outside network?

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• Are there any tools to diff two VMWARE Windows XP images?

  - by ojblass

  Is there any tool that can summarize Registry and File differences between two VMWARE Windows XP images?

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• Are there any well known anti-patterns in the field of system administration?

  - by ojblass

  I know a few common patterns that seem to bedevil nearly every project at some point in its life cycle: Inability to take outages Third party components locking out upgrades Non uniform environments Lack of monitoring and alerting Missing redundancy Lack of Capacity Poor Change Management Too liberal or tight access policies Organizational changes adversely blur infrastructure ownership I was hoping there is some well articulated library of these anti-patterns summarized in a book or web site. I am almost positive that many organizations are learning through trial by fire methods. If not let's start one.

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• What exactly is a proxy?

  - by ojblass

  What does a proxy do and how is it related to getting out of my network to the outside network?

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• I would like to allow login to a box with no password for a particular user how do I do that?

  - by ojblass

  I would like a userid to allow logging into a box without a password. I am not sure how to accomplish this as changing the password to nothing is not allowed. Thanks

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• Are there multiline comment delimiters in SQL that are vendor agnostic?

  - by ojblass

  While editing, building up, or cherry picking from SQL statements I can find myself interacting with one of four popular database tools. I have been resorting to single line commenting for DB2 and Informix. I have created macros in vim to make this slightly more efficient but I was wondering if I am working too hard.

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• gcc linker finding both .so and .a in the library path which is chosen?

  - by ojblass

  If I run gcc -c a.c -L /usr/lib -lexpat and both libexpat.a and libexpat.so are in /usr lib which one is used by the linker?

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• Is there any benefit to encrypting twice using pgp?

  - by ojblass

  I am asking from a "more secure" perspective. I can imagine a scenario with two required private keys needed for decryption scenarios that may make this an attractive model. This is to settle an argument. My vote is that it is not adding any additional security other than having to compromise two different private keys. I think that if it was any more secure than encrypting it one million times would be the best way to secure informaiton and I don't buy it. So I guess my question becomes is a two locking mechanism equivalent to another one locking mechanism with a single key? Update: Forgive me if the answer is obvious but my bread goes dead as I read books on the topic.

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• perl order of opendir return results?

  - by ojblass

  opendir MYDIR, "$dir"; my @FILES = readdir MYDIR; closedir MYDIR; It appears that 99.9 % of the time the first two entries in the array are always “.” and “..”. Later logic in the script has issues if it is not true. I ran into a case where the directory entries appeared later. Is this indicative of the file system being corrupt or something else? Is there a known order to what opendir returns?

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• What is the fastest way to check if files are identical?

  - by ojblass

  If you have 1,000,0000 source files, you suspect they are all the same, and you want to compare them what is the current fasted method to compare those files? Assume they are Java files and platform where the comparison is done is not important. cksum is making me cry. When I mean identical I mean ALL identical. Update: I know about generating checksums. diff is laughable ... I want speed. Update: Don't get stuck on the fact they are source files. Pretend for example you took a million runs of a program with very regulated output. You want to prove all 1,000,000 versions of the output are the same. Update: read the number of blocks rather than bytes? Immediatly throw out those? Is that faster than finding the number of bytes? Update: Is this ANY different than the fastest way to compare two files?

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• Are zip code and postal code violation of 3rd normal form?

  - by ojblass

  Given that state information is implicit in the zip code aren't storing both of them some violaiton of third normal form? Can or should you simply combine them into one field?

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• Should Perl's opendir always return . and .. first?

  - by ojblass

  opendir MYDIR, "$dir"; my @FILES = readdir MYDIR; closedir MYDIR; It appears that 99.9 % of the time the first two entries in the array are always “.” and “..”. Later logic in the script has issues if it is not true. I ran into a case where the directory entries appeared later. Is this indicative of the file system being corrupt or something else? Is there a known order to what opendir returns?

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