ubuntu vsftpd

sudo apt-get install vsftpd

vsftpd的相關設定檔：
/etc/vsftpd.conf
/etc/vsftpd.chroot_list

修改設定檔：修改之前記得先備份。
sudo gedit /etc/vsftpd.conf

設定檔中，一些重要的設定說明：
# Allow anonymous FTP? (Disabled by default)
anonymous_enable=NO
是否允許任意使用者連線，預設為=NO，只想給自己使用的就請設為NO

# Uncomment this to allow local users to log in.
local_enable=YES
是否允許本機使用者登入FTP，使用自己的帳號登入者請設為YES

# Uncomment this to enable any form of FTP write command.
write_enable=YES
是否開放寫入的權限，視需求設定，一般開放給自己的就都設為YES

# Default umask for local users is 077. You may wish to change this to 022,
# if your users expect that (022 is used by most other ftpd's)
可寫入，且可新增目錄、檔案權限為 775
local_umask=002

chroot_local_user=YES
chroot_list_enable=YES
chroot_list_file=/etc/vsftpd.chroot_list
關於以上三個設定說明如下：
chroot，就是讓使用者變換根目錄的功能，在登入FTP Server時，預設根目錄為使用者的home directory

chroot_local_user=YES
chroot_list_enable=YES
這樣的設定，讓所有使用者無法變換根目錄，除了/etc/vsftpd.chroot_list中所列的使用者。

都改好了記得要重新啟動vsftpd，才會生效。

sudo /etc/init.d/vsftpd restart

連線進入自己的vsFTPd時，有兩個必要條件，第一個當然電腦要開著，第二個就是要知道自己電腦的IP（有域名的就直接用域名）。

如果您是固定IP上網，要連入自己的vsFTPd就很簡單，但是台灣大多數的連線都是ADSL，是浮動IP，每次上網都會變動，要知道自己電腦上網時的真實IP，可以開啟終端機查詢：
sudo ifconfig

================================================

新增本地使用者+指定登陸瀏覽目錄設定

sudo useradd -d /ex/ex2 -M test

指令說明：新增帳號為test的本地使用者，限制瀏覽目錄於/ex2這個目錄以下，可以往下，無法到上層/ex

sudo passwd test

指令說明：設定本地帳號test使用者的密碼，可新增設定多組使用

sudo useradd -d /ex/ex2 -M test2

sudo passwd test2

若要更改指定目錄則-d後面的/ex/ex2更換即可，但是這個地方須留意的就是權限

/ex這個為上層目錄，上層目錄不能為chomd 777，這樣的話會變成權限過大，vsftpd無法登陸

===============================

疑難雜症

1. 530 Login incorrect.
   檢查 pam.d/vsftpd 的設定，該註解的要註解掉。另外，auth 及 account 同一行內不可以有註解符號(#)。
2. 500 OOPS: vsftpd: refusing to run with writable root inside chroot()
   這是因為新版的 vsftpd 限制當啟用chroot時，user的home目錄不可以有寫入的權限，只可以在子目錄下做寫入的動作。google大神上的解法，除了安裝另一個套件(可參考這裡)我沒測試過外，其餘目前測試都無效。所以乖乖把寫入的權限拿掉吧。

   chmod a-w /srv/ftp/user1
   

3. 226 transfer done (but failed to open directory)
   這是因為目錄沒有x權限的問題，把x權限加上去即可

   chmod a+x /srv/ftp/user1 
   

4. 550 Failed to change directory
   同226的問題，把x權限加上去即可

   chmod a+x /srv/ftp/user1 

apt-get remove application

sudo apt-get remove application
sudo apt-get remove application*

sudo apt-get remove --purge application
sudo apt-get remove --purge application*

sudo apt-get purge application
sudo apt-get purge application*

ssh-

server:
ssh-keyscan -t rsa 192.168.0.1


client:
past the result in to

/Users/xxx/.ssh/known_hosts


===============
if it is harmless
===============You can use the following one liner to remove that one line (line 3) from the file.

$ sed -i 3d ~/.ssh/known_hosts

list all installed packages

dpkg --get-selections | grep -v deinstall

dpkg-query -l


---------------------------



npm list -g --depth=0

npm list [[@<scope>/]<pkg> ...] npm ls [[@<scope>/]<pkg> ...] npm la [[@<scope>/]<pkg> ...] npm ll [[@<scope>/]<pkg> ...]
---------------------------
disk used



du -shc /home/*

df
df -a
df -h







changing group ownership, group

chgrp groupname groupfile

Changing file ownership

chown peter peterfile

visudo , add user

1_
useradd Example - Add a new user to secondary group

useradd -G {group-name} username

2_
See Which Groups Your Linux User Belongs To
 groups peterd


3_
useradd -G admingroup Username

4_
%admingroup ALL=(ALL) ALL




If you do not see any output then you need to add group developers using the groupadd command:
# groupadd developers
Next, add a user called vivek to group developers:
# useradd -G developers vivek
Setup password for user vivek:
# passwd vivek
Ensure that user added properly to group developers:
# id vivek

usermod example - Add a existing user to existing group

Add existing user tony to ftp supplementary/secondary group with the usermod command using the -a option ~ i.e. add the user to the supplemental group(s). Use only with -G option:
# usermod -a -G ftp tony
In this example, change tony user's primary group to www, enter:
# usermod -g www tony

add user to sudoer

sudo adduser <username> sudo

create directory for user and group

'You will need to create the users directory manually. This requires three steps:

1. Create directory in compliance to /etc/passwd, usually there will be already a /home/login entry.
2. Copy initial files from /etc/skel
3. And finally set right permissions:
   • mkdir /home/YOU
   • cd /home/YOU
   • cp -r /etc/skel/. .
   • chown -R YOU.YOURGROUP .
   • chmod -R go=u,go-w .
   • chmod go= .

Add user with home directory

useradd -m USERNAME

passwd USERNAME

airodump, fixed channel -1

方法二
airmon-ng stop wlan0
ifconfig wlan0 down
iwconfig wlan0 mode managed
ifconfig wlan0 up
iwconfig wlan0 channel (这里输入你的channel)
ifconfig wlan0 down
iwconfig wlan0 mode monitor
ifconfig wlan0 up





follow the 18 steps:

https://forums.kali.org/showthread.php?20582-HOW-TO-FIX-Airodump-ng-fixed-channel-1-Kali-kernel-3-12-also-on-rt2870-3070usb

here's how to :
Download backport driver 3.12-1 and extract :
1

Code:

cd /usr/src/

2

Code:

sudo wget https://www.kernel.org/pub/linux/kernel/projects/backports/stable/v3.12/backports-3.12-1.tar.bz2

3

Code:

sudo tar xvf backports-3.12-1.tar.bz2

4

Code:

cd backports-3.12-1

5

Code:

sudo apt-get install patch

download and apply patch
6

Code:

sudo wget http://patches.aircrack-ng.org/mac80211.compat08082009.wl_frag+ack_v1.patch

7

Code:

sudo patch -p1 < mac80211.compat08082009.wl_frag+ack_v1.patch

download compatdrivers_chan_qos_frag.patch by Mathy Vanhoef I recommend using this because I have correct offset
8

Code:

sudo wget -Ocompatdrivers_chan_qos_frag.patch http://www.pastie.org/pastes/8846771/download

9

Code:

patch -p1  < compatdrivers_chan_qos_frag.patch

download my patch
10

Code:

sudo wget -Ofix-channel-negative-1-on-new-backport-by-Devil_D.patch http://pastebin.com/wPwAJaQC

11

Code:

patch -p1  < fix-channel-negative-1-on-new-backport-by-Devil_D.patch

if you do not know what is the proper wireless drivers type and go on step 14 
12

Code:

make old config

13
if you know your driver type for example i have rt2870/3070 i type
make deconfig-wifi To know which driver you just run in terminal airmon-ng 

Code:

make defconfig-alx
make defconfig-ar5523
make defconfig-ath10k
make defconfig-ath5k
make defconfig-ath6kl
make defconfig-ath9k
make defconfig-b43
make defconfig-b43legacy
make defconfig-brcmfmac
make defconfig-brcmsmac
make defconfig-carl9170
make defconfig-drm
make defconfig-ieee802154
make defconfig-iwlwifi
make defconfig-media
make defconfig-nfc
make defconfig-regulator
make defconfig-rtlwifi
make defconfig-wifi
make defconfig-wil6210

14

Code:

make

15

Code:

make install

16

Code:

update-initramfs -u

17

Code:

reboot

I hope it help  Happy Hacking
as always  I apologize for the English mistakes are the fault of google translate 
and I thank the sources
Mathy Vanhoef http://www.mathyvanhoef.com/2012/09/...patch-for.html
Devil_D 
J0K3R-BHS

monitor linux preformance

http://www.tecmint.com/command-line-tools-to-monitor-linux-performance/

1. Top – Linux Process Monitoring

2. VmStat – Virtual Memory Statistics

3. Lsof – List Open Files

5. Netstat – Network Statistics

4. Tcpdump – Network Packet Analyzer

6. Htop – Linux Process Monitoring

7. Iotop – Monitor Linux Disk I/O

8. Iostat – Input/Output Statistics

9. IPTraf – Real Time IP LAN Monitoring

12. NetHogs – Monitor Per Process Network Bandwidth

get information hard ram cpu disk preformance

3down vote

hwinfo  free -m CPU $ cat /proc/cpuinfo Memory : $ free $ cat /proc/meminfo HDD: $ df -h $ sudo fdisk -l $ hdparm -i /dev/device (for example sda1, hda3...)

command check CPU information

$ less /proc/cpuinfo

2. lscpu

lscpu

parse and node.js install download

npm install node-parse-api

=====================

`-- node_modules

    `-- node-parse-api

        |-- index.js

        |-- lib

        |   `-- Parse.js

        |-- makefile

        |-- package.json

        |-- readme.md

        `-- test

            `-- Parse.test.js

=======================

var Parse = require('./lib/Parse');

var APP_ID='appKey';

var MASTER_KEY='masterKey';

var app = new Parse(APP_ID, MASTER_KEY);

app.insert('Group', { name:'XXX', usedTime:123, usedCount:2343}, function (err, response) {

  console.log(response);

});

/////////////////////////*    below is generating an object with one property

app.insert('Group', { name:'XXX'}, function (err, response) {

  console.log(response);

});

*/////////////////////////

documentation 

https://github.com/Leveton/node-parse-api

bitbucket, sourcetree problem : warning: templates not found /usr/local/git/share/git-core/templates

warning: templates not found /usr/local/git/share/git-core/templates

Steps:

• Source tree Menu
• Preferences
• Git
• Click on System Git under Embedded Git Version 2.2.1
• Reset to embedded Git

kali linux enable ssh

Check whether port 22 is listening or not

root@kali:~# netstat -an | grep :22
root@kali:~#

Check the status of ssh service

root@kali:~# service ssh status
[FAIL] sshd is not running … failed!
root@kali:~#

Start ssh service

root@kali:~# service ssh start
[ ok ] Starting OpenBSD Secure Shell server: sshd.
root@kali:~#

Verify the ssh status again

root@kali:~# service ssh status
[ ok ] sshd is running.
root@kali:~#

Check whether port 22 is listening or not

root@kali:~# netstat -an | grep :22
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp6       0      0 :::22                   :::*                    LISTEN
root@kali:~#
root@kali:~/Desktop#

adaptable wifi card install

lsusb

Check the driver status

$ lspci -k

Note: If the card is a USB device, running dmesg | grep usbcore should give something like usbcore: registered new interface driver rtl8187 as output.

$ dmesg | grep firmware

$ dmesg | grep iwlwifi