ldapmodify failed with error "dn: attribute type undefined"

I was facing this strange error "dn: attribute type undefined" while I am trying to delete attributes from the LDAP. My ldif file has two attributes to be deleted. cat /tmp/modifyattr.ldif dn: fsFgId=Child2, fsFgId=Child1, fsClsId=Root changetype: modify delete: fsListeningHost dn: fsFgId=Child2, fsFgId=Child1, fsClsId=Root changetype: modify delete: fsPort When ldapmodify command is executed...

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Secure way of deleting files in Unix

As I mentioned in the previous post there are simple techniques that can recover your deleted file (by using simple 'grep' or 'strings' utilities). Even some data recovery tools does the same thing. So if you want to delete some data on the disk without being worried about the retrieval, then you should probably over write the disk which has your file content. shred utility available in Linux does...

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How to recover a file that was removed using 'rm' command ?

In Unix like file systems, the system uses 'hard links' to point to piece of data that you write to the disk. So when you create a file, you also create its first hard link. You can create multiple hard links using 'ln' command. When you "delete" a file using rm command, normally you are only deleting the hard link. If all hard links to a particular file are deleted, then the system removes only...

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Calculating time differences in python

Recently I had a situation where I need to calculate the timer efficiency. I have a C++ timer that calls my function after every 5 sec. My function does some critical operation and logs one statement to syslog. When I observed the logs I found that there is delay in my function execution, slowly the timer started drifting in result and the next function calls are getting delayed !! So I wanted...

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