Home / user-377380

NoFence's questions

Martin Hope
NoFence
Asked: 2018-08-06 23:17:52 +0800 CST
  • 6

I installed ubuntu server(18.04 version) a few days ago. and I tried to install fail2ban with apt tool but couldn't do that.

Here's some information on my situation.

root@ubuntu:~# cat /etc/os-release | grep -i version
VERSION="18.04.1 LTS (Bionic Beaver)"
VERSION_ID="18.04"
VERSION_CODENAME=bionic

root@ubuntu:~# apt search fail2ban
Sorting... Done
Full Text Search... Done

Why cant' I search fail2ban on ubuntu package repository?

18.04 fail2ban
Martin Hope
NoFence
Asked: 2015-08-26 23:57:55 +0800 CST
  • 1

I installed bind for caching server and recursive mode works well. But Non-recursive modes doesn't work well.

Here are option contents of /etc/named.conf (For recursive)

options {
        listen-on port 53 {localhost; any;};
        listen-on-v6 port 53 { ::1; };
        directory       "/var/named";
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        allow-query     { localhost; 192.168.0.0/24;any; };
        allow-query-cache { localhost; 192.168.0.0/24; any;};
        recursion yes;


        dnssec-enable yes;
        dnssec-validation yes;
        dnssec-lookaside auto;

        /* Path to ISC DLV key */
        bindkeys-file "/etc/named.iscdlv.key";

        managed-keys-directory "/var/named/dynamic";
};

The result says :

[root@localhost ~]# nslookup naver.com
Server:         192.168.0.220
Address:        192.168.0.220#53

Non-authoritative answer:
Name:   naver.com
Address: 125.209.222.142
Name:   naver.com
Address: 202.179.177.22
Name:   naver.com
Address: 202.179.177.21
Name:   naver.com
Address: 125.209.222.141

Here are another option contents of /etc/named.conf (For Non-recursive)

options {
        listen-on port 53 {localhost; any;};
        listen-on-v6 port 53 { ::1; };
        directory       "/var/named";
        dump-file       "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
        allow-query     { localhost; 192.168.0.0/24;any; };
        allow-query-cache { localhost; 192.168.0.0/24; any;};
        recursion no;


        dnssec-enable yes;
        dnssec-validation yes;
        dnssec-lookaside auto;

        /* Path to ISC DLV key */
        bindkeys-file "/etc/named.iscdlv.key";

        managed-keys-directory "/var/named/dynamic";
};

The result says :

[root@localhost ~]# nslookup naver.com
Server:         192.168.0.220
Address:        192.168.0.220#53

Non-authoritative answer:
*** Can't find naver.com: No answer

Why is that? Am I missing something?

networking
Martin Hope
NoFence
Asked: 2015-02-23 21:00:21 +0800 CST
  • 0

I have a question about command sudo.

Basically, you know, sudo allows any permitted users who enrolled in the /etc/sudoers to perform some commands specified in it.

At this point, I wonder how my default user account can use sudo.

The following is content of my /etc/sudoers file.

# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults        env_reset
Defaults        mail_badpass
Defaults        secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

# Host alias specification

# User alias specification

# Cmnd alias specification

# User privilege specification
root    ALL=(ALL:ALL) ALL

# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL

# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL

# See sudoers(5) for more information on "#include" directives:

#includedir /etc/sudoers.d

As you see, my account - jwl - is not registered in that file. But I can use sudo command without any problems. How can it be possible? Is there any mechanism I don't know? If so, let me know it.

Thank you for reading.

sudo
Martin Hope
NoFence
Asked: 2015-02-18 00:22:46 +0800 CST
  • 3

I used touchpad well in my notebook till yesterday night. But I booted my notebook a while ago, found touchpad doesn't work.

You know, There's nothing about touchpad in Ubuntu's system settings in my case, but just only about mouse stuff.

Look at this result of typing command xinput list please.

⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Logitech USB Optical Mouse                id=11   [slave  pointer  (2)]
⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=8    [slave  keyboard (3)]
    ↳ MSI Laptop hotkeys                        id=9    [slave  keyboard (3)]
    ↳ MSI WMI hotkeys                           id=10   [slave  keyboard (3)]

As you see, nothing about touchpad or Synaptics.

I really wanna know about cause of this situation and how could I solve that problem?

I'm waiting for your answers. Thank you.

touchpad