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使用TokuMX配置Replica Set集群 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...17.39.149:27017"
}
需要在防火墙配置中打开相应端口：
vi /etc/sysconfig/iptables
可以查看集群的详细信息：
每次启动服务的记录：
可以发现，集群的关联配置不是写在.conf文件中（即.conf配置完全独立）的。任意节点临时...
Read user input inside a loop
...
read input
echo $input;
done
Unit test:
for line in $(cat /etc/passwd); do
read input
echo $input;
echo "[$line]"
done
share
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improve this answer
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...
Execute and get the output of a shell command in node.js
...utput);
});
});
}
Usage
async function main() {
try {
const passwdContent = await execute("cat /etc/passwd");
console.log(passwdContent);
} catch (error) {
console.error(error.toString());
}
try {
const shadowContent = await execute("cat /etc/shadow");
console...
理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...tl -w kernel.panic=10
kernel.panic = 10
# echo "vm.panic_on_oom=1" >> /etc/sysctl.conf
# echo "kernel.panic=10" >> /etc/sysctl.conf
从上面的 oom_kill.c 代码里可以看到 oom_badness() 给每个进程打分，根据 points 的高低来决定杀哪个进程，这个 points 可以根据 a...
理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...implementing libraries can write code that clean up resources, close files etc. in their __exit__() functions.
实际上，在with后面的代码块抛出任何异常时，__exit__()方法被执行。正如例子所示，异常抛出时，与之关联的type，value和stack trace传给__exit__()方...
Allow user to set up an SSH tunnel, but nothing else
... may be tunneling, without an interactive shell, to set that shell in /etc/passwd to /usr/bin/tunnel_shell.
Just create the executable file /usr/bin/tunnel_shell with an infinite loop.
#!/bin/bash
trap '' 2 20 24
clear
echo -e "\r\n\033[32mSSH tunnel started, shell disabled by the system administr...
Can't su to user jenkins after installing Jenkins
...
as root, enter su - jenkins
Also, check in /etc/passwd that user jenkins is allowed to logon: there should be something like /bin/bash or /bin/sh, certainly not /bin/false at the end of the line.
Hint: You don't use su and sudo at the same time.
...
Permission denied on accessing host directory in Docker
...s script is:
# update the uid
if [ -n "$opt_u" ]; then
OLD_UID=$(getent passwd "${opt_u}" | cut -f3 -d:)
NEW_UID=$(stat -c "%u" "$1")
if [ "$OLD_UID" != "$NEW_UID" ]; then
echo "Changing UID of $opt_u from $OLD_UID to $NEW_UID"
usermod -u "$NEW_UID" -o "$opt_u"
if [ -n "$opt_r" ];...
GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
...
//设置控件的初始行数和列数
m_Grid.SetRowCount(1);
m_Grid.SetColumnCount(4);
//设置控件背景颜色，这里GetDefaultCell的两个参数分别表示是否是固定行或者是固定列。如果不设定，缺省的颜色为白色。
m_Grid.GetDefaultCell(FALSE, FALSE)->Set...
Add Keypair to existing EC2 instance
...
[ubuntu@ip-11-111-111-111 ~]$ sudo su -
[root@ip-11-111-111-111 ubuntu]# passwd john
Add “john” to sudoer’s list by:
[root@ip-11-111-111-111 ubuntu]# visudo
.. and add the following to the end of the file:
john ALL = (ALL) ALL
Alright! We have our new user created, now you need ...