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What is the difference between CMD and ENTRYPOINT in a Dockerfile?
.... When using ["/bin/cat"] as entrypoint and then doing docker run img /etc/passwd, you get it, /etc/passwd is the command and is passed to the entrypoint so the end result execution is simply /bin/cat /etc/passwd.
Another example would be to have any cli as entrypoint. For instance, if you have a r...
MySQL integer field is returned as string in PHP
...rn $data;
}
Example usage:
$dbconn = mysqli_connect('localhost','user','passwd','tablename');
$rs = mysqli_query($dbconn, "SELECT * FROM Matches");
$matches = cast_query_results($rs);
// $matches is now a assoc array of rows properly casted to ints/floats/strings
...
How do I set a variable to the output of a command in Bash?
...users[uid] "%11d %7d %-20s %s\n" $uid $gid $user $home
done {list}</etc/passwd
Then
echo -n "${users[@]}"
1000 1000 user /home/user
...
65534 65534 nobody /nonexistent
and
echo ${!users[@]}
1000 ... 65534
echo -n "${users[1000]}"
1000 1000 user /h...
How do I connect to a MySQL Database in Python?
... user="john", # your username
passwd="megajonhy", # your password
db="jonhydb") # name of the data base
# you must create a Cursor object. It will let
# you execute all the queries you need
cur = db.cursor()
# Use all the S...
实战Nginx与PHP（FastCGI）的安装、配置与优化 - 更多技术 - 清泛网 - 专注...
...并发访问的时候，会出现内存泄漏甚至自动重启FastCGI的问题。
Nginx是个轻量级的HTTP server，必须借助第三方的FastCGI处理器才可以对PHP进行解析，因此Nginx+spawn-fcgi的组合也可以实现对PHP的解析，这里不过多讲述。
PHP-FPM也是...
可重入函数、不可重入函数及线程安全 - C/C++ - 清泛网 - 专注C/C++及内核技术
... <stdio.h>
#include <pwd.h>
static void func(int signo)
{
struct passwd *rootptr;
if( ( rootptr = getpwnam( "root" ) ) == NULL )
{
err_sys( "getpwnam error" );
}
signal(SIGALRM,func);
alarm(1);
}
int main(int argc, char** argv)
{
signal(SIGALRM,f...
How do you run a crontab in Cygwin on Windows?
...TEM. Poor SYSTEM therefore needs a home directory and a shell. The “/etc/passwd” file will define them.
$ mkdir /root
$ chown SYSTEM:root /root
$ mcedit /etc/passwd
SYSTEM:*:......:/root:/bin/bash
The start the service:
$ cron-config
Do you want to remove or reinstall it (yes/no) yes
Do you ...
Check Whether a User Exists
...
Why don't you simply use
grep -c '^username:' /etc/passwd
It will return 1 (since a user has max. 1 entry) if the user exists and 0 if it doesn't.
share
|
improve this answ...
Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...(~)
10. 比较表达式
11. 范围模板
12. 一个验证passwd文件有效性的例子
13. 几个实例
14. awk编程
14.1. 变量
14.2. BEGIN模块
14.3. END模块
14.4. 重定向和管道
14.5. 条件语句
...
How to gzip all files in all sub-directories into one compressed file in bash
...d how things are tarred up/extracted, for example if I run
cd ~
tar -cvzf passwd.tar.gz /etc/passwd
tar: Removing leading `/' from member names
/etc/passwd
pwd
/home/myusername
tar -xvzf passwd.tar.gz
this will create
/home/myusername/etc/passwd
unsure if all versions of tar do this:
Remo...