01-24-2011
@vsachan
Having re-read my post I was a bit blunt yesterday. On my computer I can't unzip a file with the wrong file extension.
I have written one-off searches of large numbers of reasonably large compressed text files in Shell and realise the practical limits. On your scale this is not a job for Shell programming.
This data came from somewhere and I would be very surprised if it only ever existed as a flat file. I suppose that you might be trying to find data rejections in context?
I am very concerned that this now appears to be a fuzzy search. The length of the search string and the position and size of the searchable data varies between your posts. This makes the software design so much more difficult and I withdraw any implication that this task is feasible.
On more reflection strongly advise that you get a Systems Analyst and a Database Designer on this job with view to possibly using a database approach. To my mind it is too early to engage a Database Programmer.
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LEARN ABOUT ULTRIX
mkpasswd
mkpasswd(8) System Manager's Manual mkpasswd(8)
Name
mkpasswd - generate hashed password table
Syntax
/etc/mkpasswd [-uv] passwdfile
Description
The command is used to generate the hashed password database used by the library routines and
If the -u option is present the hashed files will not be built unless they already exist. In any case, the hashed files will not be built
if the time of last modification of the passwdfile is less recent than that of an existing hashed files.
If the -v option is supplied, each entry will be listed as it is added.
The file passwdfile is usually and must be in the format of The command will generate database files named passwdfile.pag and passwd-
file.dir. The command will exit with a non-zero exit code if any errors are detected. Otherwise it will print the number of entries pro-
cessed and the length of the longest entry.
The presence of the hashed files is optional. They are not required for correct operation of or but will improve their performance on sys-
tems with moderate to large sized files.
Diagnostics
The data base is already up to date.
If the specified file has been modified less recently than the hashed files.
Database not created.
When used with the -u option and the database does not already exist.
Files
passwdfile.dir Database filename
passwdfile.pag Database filename
See Also
getpwent(3), passwd(5), vipw(8)
mkpasswd(8)