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/etc/apt/sources.list" E212: Can't open file for writing
...o to create a root owned read only file for a lower user:
sudo touch temp.txt
sudo chown root:root temp.txt
sudo chmod 775 temp.txt
whoami
el
First open the file as normal user:
vi temp.txt
Then make some changes to the file, it warns you its read only. Use this command.
:w !chmod 777 %
Th...
WheelView 拓展：滚轮选择框扩展，滚轮日历选择框和旋转日历扩展 · App In...
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滚轮选择框扩展
Wheel Calendar 扩展
下载链接
版本信息
功能概述
扩展特性
截图
Logo 和主界面
输出示例
Spin Calendar V3 界面
...
Bash: If/Else statement in one line
...xplicitly check $?. Just do:
ps aux | grep some_proces[s] > /tmp/test.txt && echo 1 || echo 0
Note that this relies on echo not failing, which is certainly not guaranteed. A more reliable way to write this is:
if ps aux | grep some_proces[s] > /tmp/test.txt; then echo 1; else ec...
ImageConvertor 扩展：免费图像转换器，支持JPG/PNG/WEBP格式转换和图像处...
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ImageConvertor 扩展
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功能概述
版本更新历史
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基本格式转换
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Revert the `--no-site-packages` option with virtualenv
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Try removing (or renaming) the file no-global-site-packages.txt in your Lib folder under your virtual environment.
Where venv is the name of your virtual environment, and python3.4 corresponds to whichever version of python involved, for example:
$ rm venv/lib/python3.4/no-global-si...
.gitignore exclude folder but include specific subfolder
...n Blees (kblees) for Git 1.9/2.0 (Q1 2014) clarifies that case:
gitignore.txt: clarify recursive nature of excluded directories
An optional prefix "!" which negates the pattern; any matching file excluded by a previous pattern will become included again.
It is not possible to re-include ...
How to run a PowerShell script from a batch file
...ectory\with\script\ ; ./ping_batch.ps1 example.com | tee ping__example.com.txt }
Start-Job { cd c:\working\directory\with\script\ ; ./ping_batch.ps1 google.com | tee ping__google.com.txt }
# Can be run immediately
Set-ExecutionPolicy -ExecutionPolicy Default
# [Y]es
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Groovy executing shell commands
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I find this more idiomatic:
def proc = "ls foo.txt doesnotexist.txt".execute()
assert proc.in.text == "foo.txt\n"
assert proc.err.text == "ls: doesnotexist.txt: No such file or directory\n"
As another post mentions, these are blocking calls, but since we want to work wi...
Regular Expression to get a string between parentheses in Javascript
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Try string manipulation:
var txt = "I expect five hundred dollars ($500). and new brackets ($600)";
var newTxt = txt.split('(');
for (var i = 1; i < newTxt.length; i++) {
console.log(newTxt[i].split(')')[0]);
}
or regex (which is somewhat slow c...
How to check the version of GitLab?
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Find filename "version-manifest.txt"... For gitlab omnibus it is stored at "/opt/gitlab/version-manifest.txt"
– Maxim
Sep 1 '16 at 13:42
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