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snoop's questions

Martin Hope
snoop
Asked: 2015-10-17 05:52:40 +0800 CST
  • 1

输入文件“input.xml”：

<integer name="leftValue">30</integer>
<integer name="rightValue">580</integer>
<integer name="rightValueDefault">495</integer>

我希望每个数值乘以 2：

<integer name="leftValue">60</integer>
<integer name="rightValue">1160</integer>
<integer name="rightValueDefault">990</integer>

怎么做？

text-processing
Martin Hope
snoop
Asked: 2015-10-01 05:53:36 +0800 CST
  • 2

我们可以DirectX使用 wine 和OpenGLnatively 来运行。所以问题是：

  • OpenGL等同于（例如 11、12 等）的确切版本是什么DirectX，我们可以这样比较吗？
graphics
Martin Hope
snoop
Asked: 2015-09-25 07:26:06 +0800 CST
  • 0

我得到以下命令sudo apt-get update的输出sudo apt-get upgrade。

user@user-VPCCB45FN:~$ sudo apt-get update
......
......
Ign http://in.archive.ubuntu.com trusty-backports/main Translation-en_US
Ign http://in.archive.ubuntu.com trusty-backports/multiverse Translation-en_US 
Ign http://in.archive.ubuntu.com trusty-backports/restricted Translation-en_US 
Ign http://in.archive.ubuntu.com trusty-backports/universe Translation-en_US   
Fetched 3,581 kB in 59s (59.9 kB/s)                                            
Reading package lists... Done
W: GPG error: http://download.virtualbox.org trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 54422A4B98AB5139
W: GPG error: http://dl.google.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A040830F7FAC5991
W: GPG error: http://dl.google.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A040830F7FAC5991
W: GPG error: http://extras.ubuntu.com trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192
W: GPG error: http://archive.canonical.com trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://in.archive.ubuntu.com trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: https://download.01.org trusty InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A902DDA375E52366
W: GPG error: http://security.ubuntu.com trusty-security Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://in.archive.ubuntu.com trusty-updates Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://in.archive.ubuntu.com trusty-backports Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: GPG error: http://ppa.launchpad.net trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY CC079478E5B13347
user@user-VPCCB45FN:~$ sudo apt-get upgrade 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  hostapd
The following packages will be upgraded:
  apport apport-gtk python3-apport python3-problem-report
4 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
Need to get 275 kB of archives.
After this operation, 5,120 B of additional disk space will be used.
Do you want to continue? [Y/n] y
WARNING: The following packages cannot be authenticated!
  python3-problem-report python3-apport apport apport-gtk
Install these packages without verification? [y/N]

我尝试遵循现有的解决方案，但没有运气：

  1. GPG 错误 NO_PUBKEY：警告：无法验证以下包！[关闭]
  2. 如何修复 GPG 错误“NO_PUBKEY”？

我怎么解决这个问题？

apt
Martin Hope
snoop
Asked: 2015-08-08 00:59:32 +0800 CST
  • 3

我需要一个 iptables 文件的配置，它只允许我通过特定的 ip 地址连接，比如在 0-5555 范围内的所有端口上的 10.0.0.1 并拒绝所有其他 ip 地址？

我尝试了不同的 iptables 命令选项，但它没有正常工作。确切的 iptables 命令是什么？

编辑：Ubuntu 14.04 LTS

networking
Martin Hope
snoop
Asked: 2014-12-30 05:20:13 +0800 CST
  • 0

是否有像 Gedit 钴主题一样可用于 Geany Editor 的钴主题？还有如何安装这些主题。有什么办法可以为这些类型的编辑器创建我们自己的主题吗？

gedit
Martin Hope
snoop
Asked: 2014-12-28 05:30:00 +0800 CST
  • 2

假设我在 /etc/shadow 文件中有这样的内容：

root:!!:16087::::::
ftp:!!:14796::::::

在 /etc/passwd 文件中这样：

ftp:x:40:49:FTP account:/srv/ftp:/sbin/nologin
root:x:0:0:root:/root:/bin/bash

我想将它们分组为：

ftp:!!:14796::::::x:40:49:FTP account:/srv/ftp:/sbin/nologin
root:!!:16087:::::::x:0:0:root:/root:/bin/bash

我在上面做了什么：

我首先从两个文件中找到命令用户名，然后将它们连接成一行。此外，我正在从第二行删除用户名（因为这已经存在于开始时所以不需要 2 次）。

简单的命令是什么？

command-line
Martin Hope
snoop
Asked: 2014-12-25 02:16:12 +0800 CST
  • 1

可以说我有这样的文件内容：

this is a simple file for testing purpose
with few lines in it.
to check the cat and grep command to verfy which is best and less excution time consuming

首先我试过：

time cat temp.txt

输出：

this is a simple file for testing purpose
with few lines in it.
to check the cat and grep command to verfy which is best and less excution time consuming

real    0m0.001s
user    0m0.000s
sys     0m0.001s

其次我试过：

time grep "$"  temp.txt

输出：

this is a simple file for testing purpose
with few lines in it.
to check the cat and grep command to verfy which is best and less excution time consuming

real    0m0.002s
user    0m0.000s
sys     0m0.002s

第三我试过：

time awk  "/$/"  temp.txt

输出：

this is a simple file for testing purpose
with few lines in it.
to check the cat and grep command to verfy which is best and less excution time consuming

real    0m0.004s
user    0m0.001s
sys     0m0.004s

和：

time awk 1 temp.txt

输出：

this is a simple file for testing purpose
with few lines in it.
to check the cat and grep command to verfy which is best and less excution time consuming

real    0m0.004s
user    0m0.000s
sys     0m0.003s

使用 sed：

time sed "" temp.txt

输出：

this is a simple file for testing purpose
with few lines in it.
to check the cat and grep command to verfy which is best and less excution time consuming

real    0m0.002s
user    0m0.000s
sys     0m0.002s

这意味着 cat 是打印所有文件内容的更好命令。因为它执行所需的时间更少。？

grep
Martin Hope
snoop
Asked: 2014-12-24 06:12:14 +0800 CST
  • 0

我有这样的文件内容：

aaa accounting exec ...
aaa accounting exec ...
aaa accounting commands ..
aaa accounting commands ..
aaa accounting commands ..
aaa accounting commands ..
aaa accounting commands ..
aaa accounting commands ..
aaa accounting network ..
aaa accounting connection ..
aaa accounting system ..
!
aaa accounting exec default
 action-type start-only
 group tacacs+
!
aaa accounting exec default stop-only group tacacs+

输出应该是这样的：

aaa accounting exec default ..
aaa accounting exec default
 action-type start-only
 group tacacs+
!
aaa accounting exec default ..

我试过以下sed命令：

sed -n '/aaa accounting exec default/,/!/p' AboveFileContent.txt

但这不是我想要的。

解决方案是什么？我也尝试过使用awk但同样的结果即将到来。获得准确输出的命令是什么？

sed