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9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
9个常用iptables配置实例iptables命令可用于配置Linux的包过滤规则，常用于实现防火墙、NAT。咋一看iptables的配置很复杂，掌握规律后，其实用iptables完成指定任务...iptables命令可用于配置Linux的包过滤规则，常用于实现防火墙、NAT。...
how to return index of a sorted list? [duplicate]
...
You can use the python sorting functions' key parameter to sort the index array instead.
>>> s = [2, 3, 1, 4, 5]
>>> sorted(range(len(s)), key=lambda k: s[k])
[2, 0, 1, 3, 4]
>>>
...
How to get item's position in a list?
...
print(testlist.index(element) if element in testlist else None)
or the "pythonic way", which I don't like so much because code is less clear, but sometimes is more efficient,
try:
print testlist.index(element)
except ValueError:
pass
...
Update value of a nested dictionary of varying depth
...t somewhat peculiar coding and at least one bug. I'd recommend, instead:
Python 2:
import collections
def update(d, u):
for k, v in u.iteritems():
if isinstance(v, collections.Mapping):
d[k] = update(d.get(k, {}), v)
else:
d[k] = v
return d
Pytho...
Is there a command to list all Unix group names? [closed]
...
On Linux, macOS and Unix to display the groups to which you belong, use:
id -Gn
which is equivalent to groups utility which has been obsoleted on Unix (as per Unix manual).
On macOS and Unix, the command id -p is suggested for ...
Creating a new user and password with Ansible
...st be hashed.
- hosts: all
user: root
vars:
# created with:
# python -c 'import crypt; print crypt.crypt("This is my Password", "$1$SomeSalt$")'
password: $1$SomeSalt$UqddPX3r4kH3UL5jq5/ZI.
tasks:
- user: name=tset password={{password}}
If your playbook or ansible command l...
How to check if string input is a number? [duplicate]
...t things like 4.1 when technically only 4 is valid. It is also against the python mentality to have secret conversions like this happening and I would prefer to do strict checks at my public interface
– Peter R
Feb 19 '15 at 14:24
...
Running SSH Agent when starting Git Bash on Windows
....S: These instructions are in context of a Bash shell opened in Windows 10 Linux Subsystem and doesn't mention about sym-linking SSH keys generated in Windows with Bash on Ubuntu on Windows
1) Update your .bashrc by adding following in it
# Set up ssh-agent
SSH_ENV="$HOME/.ssh/environment"
functi...
How to retry after exception?
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@g33kz0r the for-else construct in Python executes the else clause if the for loop doesn't break. So, in this case, that section executes if we try all 10 attempts and always get an exception.
– xorsyst
Jan 28 '15 at 11:...
How to create a tuple with only one element
... make them tuples. You have to add a comma after the string to indicate to python that it should be a tuple.
>>> type( ('a') )
<type 'str'>
>>> type( ('a',) )
<type 'tuple'>
To fix your example code, add commas here:
>>> a = [('a',), ('b',), ('c', 'd')]
...