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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...
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...
Revert the `--no-site-packages` option with virtualenv
...
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
...
裁员！裁员！创业者们的2016“寒冬大逃杀” - 资讯 - 清泛网 - 专注IT技能提升
...重新找工作也得降薪，大部分公司都在缩减成本。”
在百度搜索，关于“裁员”的新闻有263,000篇，整整38页，其中30页是发生在2016年的。
从理性上看，这是必然之举。一个美元基金合伙人对36氪说，前段时间他碰到自己投的一...
Groovy executing shell commands
...
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
...
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?
...
Find filename "version-manifest.txt"... For gitlab omnibus it is stored at "/opt/gitlab/version-manifest.txt"
– Maxim
Sep 1 '16 at 13:42
...
Difference between fprintf, printf and sprintf?
... point to other files or devices:
$ myprog < inputfile.dat > output.txt 2> errors.txt
In this example, stdin now points to inputfile.dat, stdout points to output.txt, and stderr points to errors.txt.
fprintf writes formatted text to the output stream you specify.
printf is equival...