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maniat1k's questions

Martin Hope
maniat1k
Asked: 2019-06-10 08:17:11 +0800 CST
  • 0

我有一个 Debian 安装

~$ cat /etc/os-release 
PRETTY_NAME="Debian GNU/Linux 9 (stretch)"
NAME="Debian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/

我安装 PostgreSQL 的地方

 PostgreSQL 11.3 (Debian 11.3-1.pgdg90+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516, 64-bit

PostgreSQL 正在运行，但我可以在另一台机器上使用它：我通过 firewalld 打开了 5432 端口

# firewall-cmd --zone=public --list-ports
8443/tcp 5432/tcp

但它不起作用。

这在本地

~$ telnet localhost 5432
Trying ::1...
Connected to localhost.
Escape character is '^]'.

这是来自我的机器（在另一个 vlan 上）

:> telnet 192.168.13.183 5432
Trying 192.168.13.183...
telnet: Unable to connect to remote host: Connection refused

这是来自另一台机器（在与 debian 相同的 vlan 中）

telnet 192.168.13.183 5432
Trying 192.168.13.183...
telnet: connect to address 192.168.13.183: Connection refused

所以我关闭了firewalld（只是为了测试），但我得到了相同的结果。之后，我尝试使用 iptables 做同样的事情：

iptables -A INPUT -p tcp --dport 5432 -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT
iptables -A OUTPUT -p tcp --sport 5432 -m conntrack --ctstate ESTABLISHED -j ACCEPT

结果相同我在这里缺少什么？

只需检查一下（感谢@thomas）：

netstat -tulpan | grep postgres
tcp        0      0 127.0.0.1:5432          0.0.0.0:*               LISTEN      6386/postgres       
tcp6       0      0 ::1:5432                :::*                    LISTEN      6386/postgres       
udp6       0      0 ::1:44652               ::1:44652               ESTABLISHED 6386/postgres

lsof -n -i:5432
COMMAND   PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
postgres 6386 postgres    3u  IPv6  72390      0t0  TCP [::1]:postgresql (LISTEN)
postgres 6386 postgres    5u  IPv4  72391      0t0  TCP 127.0.0.1:postgresql (LISTEN
debian iptables
Martin Hope
maniat1k
Asked: 2019-03-09 05:32:59 +0800 CST
  • 2

抱歉，买的是西班牙语：

~# apt install vim
Leyendo lista de paquetes... Hecho
Creando árbol de dependencias       
Leyendo la información de estado... Hecho
El paquete vim no está disponible, pero algún otro paquete hace referencia
a él. Esto puede significar que el paquete falta, está obsoleto o sólo se
encuentra disponible desde alguna otra fuente

E: El paquete «vim» no tiene un candidato para la instalación

基本上

The «vim» package does not have a candidate for installation

我已经安装并更新了 Debian 9。

我必须添加什么源/etc/apt/sources.list才能安装 Vim？

@stephen-kitt 这是我的贴切政策（谢谢！）

~# LC_ALL=C apt policy
Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://deb.debian.org/debian stretch-updates/main amd64 Packages
     release o=Debian,a=stable-updates,n=stretch-updates,l=Debian,c=main,b=amd64
     origin deb.debian.org
 500 http://security.debian.org/debian-security stretch/updates/contrib amd64 Packages
     release v=9,o=Debian,a=stable,n=stretch,l=Debian-Security,c=contrib,b=amd64
     origin security.debian.org
 500 http://security.debian.org/debian-security stretch/updates/main amd64 Packages
     release v=9,o=Debian,a=stable,n=stretch,l=Debian-Security,c=main,b=amd64
     origin security.debian.org
Pinned packages:
debian apt
Martin Hope
maniat1k
Asked: 2018-03-28 12:06:42 +0800 CST
  • 1

我想知道一种方法来只显示我在任何正在运行的虚拟机上拥有的每个 NIC 的 MAC 地址：

到目前为止，我有这个：

ipcopv2
-----------------------------------------------
Groups:          /Infraestructura
State:           powered off (since 2018-03-16T13:30:56.389000000)
NIC 1:           MAC: 080027D40320, Attachment: Bridged Interface 'eth1.15', Cable connected: on, Trace: off (file: none), Type: 82540EM, Reported speed: 0 Mbps, Boot priority: 0, Promisc Policy: deny, Bandwidth group: none
NIC 2:           MAC: 080027660656, Attachment: Bridged Interface 'eth1', Cable connected: on, Trace: off (file: none), Type: 82540EM, Reported speed: 0 Mbps, Boot priority: 0, Promisc Policy: deny, Bandwidth group: none
NIC 3:           MAC: 0800270D3D9E, Attachment: Bridged Interface 'eth0', Cable connected: on, Trace: off (file: none), Type: 82540EM, Reported speed: 0 Mbps, Boot priority: 0, Promisc Policy: deny, Bandwidth group: none
Capture screens:    0
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

我想要这个：

ipcopv2
-----------------------------------------------
Groups:          /Infraestructura
State:           powered off (since 2018-03-16T13:30:56.389000000)
NIC 1:           MAC: 080027D40320, Attachment: Bridged Interface 'eth1.15', Cable connected: on
NIC 2:           MAC: 080027660656, Attachment: Bridged Interface 'eth1', Cable connected: on
NIC 3:           MAC: 0800270D3D9E, Attachment: Bridged Interface 'eth0', Cable connected: on
Capture screens:    0
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

如何做到这一点？我想了解如何阅读信息并仅使用 bash 显示该部分。

shell-script virtualbox