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How can I remove specific rules from iptables?
...oblems looks this way:
1. Add temporary rule with some comment:
comment=$(cat /proc/sys/kernel/random/uuid | sed 's/\-//g')
iptables -A ..... -m comment --comment "${comment}" -j REQUIRED_ACTION
2. When the rule added and you wish to remove it (or everything with this comment), do:
iptables-save...
How to cancel/abort jQuery AJAX request?
...ct
return $def.promise();
}
// initiate first call
singleAjax('/ajax.php', {a: 1, b: 2})
.always(function(a,b,c) {console && console.log(a,b,c);});
// second call kills first one
singleAjax('/ajax.php', {a: 1, b: 2})
.always(function(a,b,c) {console && console.log(a,b,...
Check orientation on Android phone
...gravity sensor to figure out orientation properly.
– Cat
Aug 21 '14 at 23:08
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show 2 more comments
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PG undefinedtable error relation users does not exist
...d to be passed. Otherwise, you shall to prepare the database (this is deprecated in Rails 4):
rake db:test:prepare
and then (if it is actually required):
RAILS_ENV=test rake db:seed
On newer versions of Rails the error ActiveRecord::NoEnvironmentInSchemaError may be risen, so just prepend the ...
Detect when an image fails to load in Javascript
...y wouldn't try and load an image that isn't there.
– PHP Guru
Feb 12 at 19:29
1
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How do I move a redis database from one server to another?
...dis.conf, and you can search through it to find where your .rdb files are: cat /etc/redis/redis.conf | grep "rdb". In my case it's /var/lib/redis
– Herman Schaaf
Apr 29 '13 at 13:05
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How to set environment variable for everyone under my linux system?
...orn shell also read /etc/profile - it is probably the mostly widely used location for system environment setting. Some versions of the C shell look in /etc/csh.cshrc and /etc/csh.login as well as per-user locations; others do not use any system environment setting file.
– Jonat...
How to pass payload via JSON file for curl?
...
curl sends POST requests with the default content type of application/x-www-form-urlencoded. If you want to send a JSON request, you will have to specify the correct content type header:
$ curl -vX POST http://server/api/v1/places.json -d @testplace.json \
--header "Content-Type: applic...
Convert MySql DateTime stamp into JavaScript's Date format
...
#MySQL
select date_format(my_date_column,'%Y-%m-%dT%T') from my_table;
#PHP
$php_date_str = substr($mysql_date_str,0,10).'T'.substr($mysql_date_str,11,8);
//JavaScript
js_date_str = mysql_date_str.substr(0,10)+'T'+mysql_date_str.substr(11,8);
...
How to delete and replace last line in the terminal using bash?
... beginning of the line, then the kill clears everything from that cursor location to the end, leaving the whole line blank, which is the intent. You put those at the beginning of each new line, similarly to Ken's answer, so that it is written on an empty line.
– Derek Veit
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