Hi,
s/#.*/##
The above is used either to indicate a substitution of a string. The "s"
indicates substitute. The rule is, that whatever you specifiy after the "s",
is the regex that you are looking for (this in the above case "#.*"). This
is then separated by a "/". Anything after is the replace parameter, ended
by a "/".
There are other switches that can be placed after the last "/", usually:
g (indicates a global search/replace)
d (delete the line)
HTH,
Thomas Adam
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