6,825 reputation
1831
bio website alerque.com
location Izmir, Turkey
age 32
visits member for 4 years, 3 months
seen Jul 20 at 7:42

I am a scripting language connoisseur, regular expression aficionado, network geek, general lover of Linux and a frequent contributor to open source software. I transitioned to programming from other work because I was too busy automating my own work environment to actually do the other work. I have a hobby interest in cartography. For more see my personal site. Most importantly, my life is defined by the grace of God given to men through Jesus Christ. It is my ambition that everything I do would reflect His glory and point people towards Him.


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awarded  Yearling
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awarded  Good Answer
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awarded  Good Answer
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awarded  Self-Learner
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awarded  Custodian
Sep
18
revised Crond offset five minute schedule
added 132 characters in body
Sep
18
comment Crond offset five minute schedule
Putting the sleep in the script itself is an ugly hack that makes running the script by hand from the prompt painful. There is a less ugly way to hack that by making the sleep part of the crontab entry, but an even more elegant way is to just offset the jobs using the correct crontab notation, which your answer doesn't touch on.
Sep
18
answered Crond offset five minute schedule
Aug
26
comment How to find out which Linux distribution I'm logged on to
@ychaouche: See comment above. First test with uname and if all you get is generic, test for lsb_release and use that.
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awarded  Taxonomist
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awarded  Caucus
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awarded  Yearling
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awarded  Enlightened
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awarded  Nice Answer
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revised Amazon EC2 AutoScaling WordPress
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Aug
23
comment Is a reboot required after edit/saving linux iptables?
If you have something that is not "taking effect" it's because you have entered the rules in the wrong order. First match wins. If you have a block rule that matches, the packet will get dropped even if some rule you added later allows it. You need to specifically allow the things you want before you deny everything else. You may need to flush the tables and start over if you have to change the order of something you've already entered. You can also specifically delete rules form the table and added them back in the right order.
Aug
23
comment Is a reboot required after edit/saving linux iptables?
A reboot actually CLEARS all iptables rules. On first boot the tables will always be empty, you ALWAYS have to set all the rules after booting. That's what the iptables-save helper script thing does ... takes all the current rules and dumps them to a file that can then get re-run on the next boot. Rebooting doesn't make anything take effect, it actually forgets EVERYTHING. If you run iptables -L to list what is in the tables, whatever is there is what is being enforced that instant. This is very easy to prove in practice.
Aug
23
answered Is a reboot required after edit/saving linux iptables?
Aug
16
answered Does Amazon AWS block multiple connection from the same IP?
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awarded  Excavator