09-26-2019
It's an interesting example of how discredited programming methods get renamed to make them acceptable again.
- Self-modifying code? Obviously bad and never allowed, at all, ever.
- Self-installable plugins? Too useful to get rid of.
- Goto? The despised root of all programming evil. Never do this!
- Try/catch? Too useful to get rid of.
But renaming them, instead of teaching them as what they are, downplays their risks.
These 2 Users Gave Thanks to Corona688 For This Post:
6 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
being ordinary user (not having any administrative rights) can avail myself a facility to know who logged and logged out with their timings get popped onto my terminal as if it get echo 'ed... (3 Replies)
Discussion started by: vkandati
3 Replies
2. Ubuntu
I stumbled across a somewhat strange behavior of tar and find no explanation for it: i was testing a DVD for read errors and thought to simply tar the content and direct the output to /dev/null:
tar -cvf - /my/mountpoint/*ts > /dev/null
This way i expected the system to read the complete... (4 Replies)
Discussion started by: bakunin
4 Replies
3. IP Networking
Hi,
We have a website running on a local centos 5.4 surfer, static IP.
The domain.com uses no-ip.com to take care of the DNS, it forwards all to my server.
My router receives the port 80 call, routes it to my server and the world can see domain.com perfectly fine.
However, we cannot see... (3 Replies)
Discussion started by: lawstudent
3 Replies
4. UNIX for Dummies Questions & Answers
I have scheduled couple of shell scripts to run using 'at' command.
The o/p of at -l is:
$ at -l
1320904800.a Thu Nov 10 01:00:00 2011
1320894000.a Wed Nov 9 22:00:00 2011
1320876000.a Wed Nov 9 17:00:00 2011
$ uname -a
SunOS dc2prcrptetl2 5.9 Generic_122300-54 sun4u sparc... (2 Replies)
Discussion started by: superparticle
2 Replies
5. Shell Programming and Scripting
I have the below to direct the values to a xml file,
echo "<xml version="1.0">" >> /root/xml/sample.xml
but when the check the sample.xml file, the output looks like the below one(without double quotes)
<xml version=1.0>
but i want the output like
<xml version="1.0">
Any help on... (8 Replies)
Discussion started by: vel4ever
8 Replies
6. UNIX for Beginners Questions & Answers
Hi All,
I have a requirement to get the address values from a large log file along with the user details.
line1,line2,city,stateCode,postalCode,countryCode. The below code as advised in the earlier post is giving the user data
zgrep -B1 "Failed to calculate Tax" log.2018-05-23.gz | grep... (8 Replies)
Discussion started by: nextStep
8 Replies
LEARN ABOUT DEBIAN
rblcheck
RBLCHECK(1) User Commands RBLCHECK(1)
NAME
rblcheck - check if an IP address is blacklisted
SYNOPSIS
rblcheck [-qtlcvh?] [-s <service>] <address> [ <address> ... ]
DESCRIPTION
rblcheck is a very basic interface to DNSBL listings such as those operated by The Spamhaus Project or Spamcop.
The general idea behind DNSBL listings is rapid lookup of IP addresses using DNS (for example, for blacklisting IP addresses because of
abuse). Each IP address is reversed and has a domain name attached to it; for example, the IP address 127.0.0.2 would become 2.0.0.127, and
then a domain such as "relays.visi.com" would be added to it. You would then try to resolve the result (ie. 2.0.0.127.relays.visi.com); if
you receive a positive reply, then you know that the address is listed. Further information can also be queried, such as text descriptions
of why the address was listed.
OPTIONS
-q Quiet mode; outputs only matching IP address(es) - use return code (see below).
-t Print a TXT record, if any.
-m Stop checking after first address match in any list.
-l List default DNSBL services to check.
-c Clear the current list of DNSBL services.
-s <service>
Toggle service in the DNSBL list.
-h, -? Display the help message.
-v Display version information.
<address>
An IP address to look up; specify `-' to read multiple addresses from standard input.
RETURN CODES
When invoked, rblcheck returns either 0 (to indicate error, or that the address was not in any of the listings), or a positive number
(indicating the number of listings that the IP address was found in).
SEE ALSO
/usr/share/doc/rblcheck/, esp. /usr/share/doc/rblcheck/rblcheck.txt.gz
COPYRIGHT
Copyright (C) 1997, 1998, 1999, 2000, 2001 Edward S. Marshall
Man page created for the Debian Project with the help of help2man(1) based on the output of `rblcheck -h` and the above mentioned text file
by Gregor Herrmann <gregor+debian@comodo.priv.at>.
rblcheck 1.5-20020316 August 2004 RBLCHECK(1)