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Delete all but the most recent X files in bash
...filesystem items sorted by how recently they were modified , in descending order (most recently modified items first) (-t), with directories printed with a trailing / to mark them as such (-p).
grep -v '/$' then weeds out directories from the resulting listing, by omitting (-v) lines that have a tra...
Comparison of full text search engine - Lucene, Sphinx, Postgresql, MySQL?
... the indexer process uses too.
Scalability is where my knowledge is more sketchy - but it's easy enough to copy index files to multiple machines and run several searchd daemons. The general impression I get from others though is that it's pretty damn good under high load, so scaling it out across mu...
Can I have multiple :before pseudo-elements for the same element?
... position: absolute;
content: "";
/* more styles: width, height, etc */
}
.circle:after {
position: absolute;
content: "";
/* more styles: width, height, etc */
}
.circle span {
/* not relative/absolute/fixed */
}
.circle span:before {
position: absolute;
content...
Linux下将Mysql和Apache加入到系统服务 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...到系统服务里面 cp usr local mysql share mysql mysql.server etc init.d mysqld #把msql的脚本文件拷到系统的启动...MySQL加入到系统服务里面
cp /usr/local/mysql/share/mysql/mysql.server /etc/init.d/mysqld #把msql的脚本文件拷到系统的启动目录下
...
Linux iptables防火墙开放mysql、apache的端口 - 操作系统(内核) - 清泛网 ...
Linux iptables防火墙开放mysql、apache的端口vi etc sysconfig iptables 修改配置，添加两条tcp端口允许的记录：[root@iZ23rlmiwviZ ~] cat etc sysconfig iptables sample configuration for iptables service vi /etc/sysconfig/iptables 修改配置，添加两条tcp端口允许...
Concatenate text files with Windows command line, dropping leading lines
...ch means it's listed at the end of the files in the loaction (alphabetical order), then windows seems to concatenate twice! I ended up using a filename of 1filename.csv to not have the problem. I guess concatting into a different folder should work also...
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C++ lambda with captures as a function pointer
... int {
entries.push_back(fpath);
return 0;
};
int ret = ftw("/etc", callback);
for (auto entry : entries ) {
cout << entry << endl;
}
return ret;
}
Edit:
I had to revisit this when I ran into legacy code where I couldn't modify the original function signature, ...
How do I get the parent directory in Python?
...h Pathlib.
Navigating inside a directory tree:
>>> p = Path('/etc')
>>> q = p / 'init.d' / 'reboot'
>>> q
PosixPath('/etc/init.d/reboot')
>>> q.resolve()
PosixPath('/etc/rc.d/init.d/halt')
Querying path properties:
>>> q.exists()
True
>>>...
How can I debug a .BAT script?
... , which calls a lot of other scripts, and I would like to see what is the order in which they are called, so that I may know where exactly I have to go about and add my modifications.
...
What exactly is the meaning of an API? [closed]
...way for an application to interact with certain system/application/library/etc.
For example, there are API's for OS (WinAPI), API's for other applications (like databases) and for specific libraries (for example, image processing), etc.
APIs are usually developed in a form consumable by a client a...