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How to check if a symlink exists
...ou can do all these tests and
get an exit status whose value indicates the error condition.
if [ ! \( -e "${file}" \) ]
then
echo "%ERROR: file ${file} does not exist!" >&2
exit 1
elif [ ! \( -f "${file}" \) ]
then
echo "%ERROR: ${file} is not a file!" >&2
exit 2
e...
【phpcms v9】PC站和手机站 全静态手机移动站方法 - 更多技术 - 清泛网 - ...
...
方法：
一、网站安装
先装好PC站，建好数据库，PC站连接按常规方法，后台站点设置域名就写www.XX.com；新建一个移动站，把phpcms v9全新的网站文件放到移动站下，移动站数据连接和PC的一样，\caches\configs\system.php设置稍微改一...
How to search a specific value in all tables (PostgreSQL)?
...
ERROR: syntax error at or near "default" LINE 3: haystack_tables name[] default '{}' (Using PostgreSQL 8.2.17 and cannot upgrade)
– Henno
May 11 '14 at 8:54
...
How to save and restore multiple different sessions in Vim?
...
507
You want something like
:mksession ~/mysession.vim
Then later you can source that vim file ...
Broken references in Virtualenvs
...ir folders inside .virtualenvs are still there and they give the following error whenever I try to run anything in them:
25...
C++ performance challenge: integer to std::string conversion
... val /= 10;
}
return s;
}
This will blow up on systems that disallow unaligned memory accesses (in which case, the first unaligned assignment via *(short*) would cause a segfault), but should work very nicely otherwise.
One important thing to do is to minimize the use of std::string. (I...
How do you use vim's quickfix feature?
...p (at least for me). I just installed this vim script for JavaScriptLint error checking, which shows errors in vim's quickfix window once I save a buffer.
...
Is it possible to have multiple statements in a python lambda expression?
...Q. Can you put multiple statements in a lambda?
A. No. But you don't actually need to use a lambda. You can put the statements in a def instead. i.e.:
def second_lowest(l):
l.sort()
return l[1]
map(second_lowest, lst)
Q. Can you get the second lowest item from a lambda by sorting the ...
GDB missing in OS X v10.9 (Mavericks)
...
This did not work for me on Maverics. Homebrew gave me an error and there seems to be quite a few open issues with the install.
– Dan Bradbury
Jan 10 '14 at 22:06
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开源跳板机(堡垒机)Jumpserver v2.0.0 使用说明 - 开源 & Github - 清泛网 ...
...机
输入e 可以进入二级菜单批量在主机执行命令，根据提示输入IP，支持通配符，可以逗号分隔，下面输入执行的命令
注意：报错可能提示没有目录权限，添加该目录并修改权限
# mkdir –p /opt/jumpserver/logs/exec_cmds
# chmod 777...