[How To] [LXDE] Fix lxrandr not working

[How To] [LXDE] Fix lxrandr not working

in case you switch from traditional harddisk to SSD and your computer boot very fast that makes xrandr run too fast and makes it not work every time. you should

1. Edit the autostart file
    vim ~/.config/autostart/lxrandr-autostart.desktop

2. Add some sleep before xrandr
[Desktop Entry]
Type=Application
Name=LXRandR autostart
Comment=Start xrandr with settings done in LXRandR
Exec=sh -c 'sleep 2 && xrandr --output VGA1 --mode 1920x1080 --same-as LVDS1 --output LVDS1 --off'
OnlyShowIn=LXDE

3. restart X and done

[How To] install adblock in openwrt or LEDE

As we know some of the wireless devices cannnot install adblock plugin such as iphone and iPad. We can modify our routers to add adblock in our open source routers.

So how to do it:

The following packages is needed:
1. adblock (the adblock package)
2. libustream-mbedtls (For https download using uclient-fetch)
3. luci-app-adblock (in case for luci interface)

    #opkg install adblock libustream-mbedtls luci-app-adblock

After installation, you need some configuration. For luci, you can find the configuration in homepage-> "Service" Tab -> "Adblock"

enable the host that you need to.

for command line configuration
you need to: (I come from Hong Kong, so I block the reg_cn)
    #/etc/init.d/adblock enable 
    #/etc/init.d/adblock start
    #uci set adblock.global.enabled='1'
    #uci set adblock.reg_cn.enabled='1'
    #uci commit

To verify correct installation
In the log tab in Adblock luci page:
    Tue May 15 14:25:18 2018 user.info adblock-[3.4.3]: blocklist with overall 29670 domains loaded successfully (NETGEAR WNDR3700v4, LEDE XXXXX)
or the same line shown in command line
    #logread |grep adblock

from client side, try ping "analytics.google.com"
    $ ping analytics.google.com
    ping: analytics.google.com: Name or service not known

Conclusion
This adblock is not as good as the browser plugin one as it just block the advertisment hosts. But at least your private information will not be sent to those ad servers.

Cheers

[How to] Setup Samba in Linux

Let see my setup environment:

Server:
- Arch Linux  4.2.5-1-ARCH
- samba Version 4.3.3

Client:
Same as server

Network Setup:
Internet - Server(192.168.1) - Router(192.168.2) - Clients

= = =
Setup procedure:
1. Installation: (For both server and client)

#pacman -Syu samba

2. Setup config

I have made a config file to share the server /tmp folder and allow only me and home subnet only.

= = =
[global]
   workgroup = WORKGROUP
   server string = Samba Server
   hosts allow = 192.168.1. 127.
   printcap name = /etc/printcap
   load printers = yes
   log file = /var/log/samba/%m.log
   max log size = 50
   security = user
   dns proxy = no
   invalid users = nobody root
   map to guest = Bad User
   max connections = 10
[homes]
   comment = Home Directories
   browseable = no
   writable = yes
[tmp]
   comment = Temporary file space
   path = /tmp
   valid users = your_user
   public = no
   writable = yes
= = =

Configure your user to samba, and enter the user password.
#pdbedit -a -u your_user

3. Run

In server:
#systemctl enable smbd.service

If you also need netbios support:
#systemctl enable nmbd.service 

Server side should be more or less ready and change to Client

Client:

Just test the samba connection to the server

user@localhost:~$ smbclient -L 192.168.1.1 -U your_user
smbclient: Can't load /etc/samba/smb.conf - run testparm to debug it
Enter your_user's password:
Domain=[WORKGROUP] OS=[Windows 6.1] Server=[Samba 4.3.3]

        Sharename       Type      Comment
        ---------       ----      -------
        tmp             Disk      Temporary file space
        IPC$            IPC       IPC Service (Samba Server)
        your_user       Disk      Home Directories
Domain=[WORKGROUP] OS=[Windows 6.1] Server=[Samba 4.3.3]

        Server               Comment
        ---------            -------
        LOCALHOST            Samba Server

        Workgroup            Master
        ---------            -------
        WORKGROUP            LOCALHOST


If you see similar output, the connection should be ready and you can mount remote samba drive

#mount -t cifs //LOCALHOST/tmp /mnt -o user=your_user,workgroup=WORKGROUP,ip=192.168.1.1
password:


Nice and Done!!

[How To] Fix Tearing on Linux Intel Graphics

#cat /etc/X11/xorg.conf.d/20-intel.conf

Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "TearFree"    "true"
EndSection

Works well on my arch linux machine. No tearing now in watching One Punch Man~ Cheers

rsync - a simple backup command

If you want to backup something just use the following command

$rsync -au /source/path/* /dest/path/folder 

In case after some days your source path have new files or some changes, just recall the command and it can simply update the destination folder to sync everything.

Alexa - a web page to show how pofitable of a web page

Alexa - http://www.alexa.com/ In internet point of view, browsing count means profit. This page can show the ranking of amount of access of a page. That is for simply, how profitable for the page is and the efficiency of putting advertisement there.

How To Download content in Python using urllib2 with example

I am working on a project that needs to download content from web and parse it's data in Python. I have done some modules which is useful in downloading stuff. Or I just share the source code.

= = =

#!/usr/bin/python2
import time
import urllib2

__user_agent = "Mozilla/5.0 (Windows NT 5.1; rv:40.0) Gecko/20100101 Firefox/40.0"

def url_req(url, cookie=None, max_retry=3, retry_wait_s=5):
    r_html = None
    retry = 0

    while 1 :
        if (retry == max_retry):
            break

        data_req = urllib2.Request(url)

        #cookie support
        data_req.add_header('User-Agent', __user_agent)
        if cookie is not None:
            data_req.add_header('Cookie', cookie)

        try:
            data_handler = urllib2.urlopen(data_req)
        except urllib2.URLError as e:
            print (e.reason)
            time.sleep(retry_wait_s)
            retry = retry+1
            continue
        except:
            pass
            time.sleep(retry_wait_s)
            retry = retry+1
            continue

        try: r_html = data_handler.read()
        except urllib2.URLError as e:
            print (e.reason)
            time.sleep(retry_wait_s)
            retry = retry+1



            r_html = None
            continue
        break

    return r_html