Kali Linux commands Function
A
 apropos - Search Help manual pages (man -k)
 apt-get  - Search for and install software packages (Debian)
 aptitude - Search for and install software packages (Debian)
 aspell - Spell Checker
 awk  -Find and Replace text, database sort/validate/index
B
 basename  - Strip directory and suffix from filenames
 bash  - GNU Bourne-Again Shell
 bc  - Arbitrary precision calculator language
 bg - Send to background
 break - Exit from a loop
 builtin - Run a shell builtin
 bzip2 - Compress or decompress named files
C
 cal - Display a calendar
 case - Conditionally perform a command
 cat  -Concatenate and print (display) the content of files
 cd - Change Directory
 cfdisk - Partition table manipulator for Linux
 chgrp - Change group ownership
 chmod  - Change access permissions
 chown - Change file owner and group
 chroot  - Run a command with a different root directory
 chkconfig - System services (runlevel)
 cksum - Print CRC checksum and byte counts
 clear - Clear terminal screen
 cmp - Compare two files
 comm - Compare two sorted files line by line
 command - Run a command – ignoring shell functions
 continue - Resume the next iteration of a loop
 cp - Copy one or more files to another location
 cron - Daemon to execute scheduled commands
 crontab  Schedule a command to run at a later time
 csplit -  Split a file into context-determined pieces
 cut - Divide a file into several parts
D
 date - Display or change the date and time
 dc - Desk Calculator
 dd - Convert and copy a file, write disk headers, boot records
 ddrescue -  Data recovery tool
 declare - Declare variables and give them attributes
 df - Display free disk space
 diff -  Display the differences between two files
 diff3 -  Show differences among three files
 dig - DNS lookup
 dir -  Briefly list directory contents
 dircolors -  Colour setup for `ls’
 dirname - Convert a full pathname to just a path
 dirs - Display list of remembered directories
 dmesg - Print kernel & driver messages
 du - Estimate file space usage
E
 echo - Display message on screen
 egrep - Search files for lines that match an extended expression
 eject - Eject removable media
 enable - Enable and disable builtin shell commands
 env -  Environment variables
 ethtool - Ethernet card settings
 eval - Evaluate several commands/arguments
 exec - Execute a command
 exit-  Exit the shell
 expect - Automate arbitrary applications accessed over a terminal
 expand - Convert tabs to spaces
 export - Set an environment variable
 expr - Evaluate expressions
F
 false - Do nothing, unsuccessfully
 fdformat - Low-level format a floppy disk
 fdisk - Partition table manipulator for Linux
 fg - Send job to foreground
 fgrep - Search files for lines that match a fixed string
 file - Determine file type
 find  -Search for files that meet a desired criteria
 fmt - Reformat paragraph text
 fold - Wrap text to fit a specified width
 for - Expand words, and execute commands
 format  -Format disks or tapes
 free - Display memory usage
 fsck-  File system consistency check and repair
 ftp  File Transfer Protocol
 function  -Define Function Macros
 fuser - Identify/kill the process that is accessing a file
G
 gawk - Find and Replace text within files
 getopts-  Parse positional parameters
 grep - Search files for lines that match a given pattern
 groupadd - Add a user security group
 groupdel - Delete a group
 groupmod - Modify a group
 groups - Print group names a user is in
 gzip  -Compress or decompress named files
H
 hash  -Remember the full pathname of a name argument
 head - Output the first part of files
 help - Display help for a built-in command
 history - Command History
 hostname - Print or set system name
I
 iconv - Convert the character set of a file
 id  -Print user and group id’s
 if-  Conditionally perform a command
 ifconfig-  Configure a network interface
 ifdown - Stop a network interface
 ifup  -Start a network interface up
 import-  Capture an X server screen and save the image to file
 install - Copy files and set attributes
J
 jobs - List active jobs
 join  -Join lines on a common field
K
 kill - Stop a process from running
 killall - Kill processes by name
L
 less  -Display output one screen at a time
 let - Perform arithmetic on shell variables
 ln  Create a symbolic link to a file
 local  Create variables
locate  Find files
 logname  Print current login name
 logout  Exit a login shell
 look  Display lines beginning with a given string
 lpc  Line printer control program
 lpr  Off line print
 lprint  Print a file
 lprintd  Abort a print job
 lprintq  List the print queue
 lprm  Remove jobs from the print queue
 ls  List information about files
 lsof  List open files
M
 make  Recompile a group of programs
 man  Help manual
 mkdir  Create new folders
 mkfifo  Make FIFOs (named pipes)
 mkisofs  Create an hybrid ISO9660/JOLIET/HFS filesystem
 mknod  Make block or character special files
 more  Display output one screen at a time
 mount  Mount a file system
 mtools  Manipulate MS-DOS files
 mtr  Network diagnostics (traceroute/ping)
 mv  Move or rename files or directories
 mmv  Mass Move and rename files
N
 netstat  Networking information
 nice  Set the priority of a command or job
 nl  Number lines and write files
 nohup  Run a command immune to hangups
 notify-send  Send desktop notifications
 nslookup  Query Internet name servers interactively
O
 open  Open a file in its default application
 op  Operator access
P
 passwd  Modify a user password
 paste  Merge lines of files
 pathchk  Check file name portability
 ping  Test a network connection
 pkill  Stop processes from running
 popd  Restore the previous value of the current directory
 pr  Prepare files for printing
 printcap  Printer capability database
 printenv  Print environment variables
 printf  Format and print data
 ps  Process status
 pushd  Save and then change the current directory
 pwd  Print Working Directory
Q
 quota  Display disk usage and limits
 quotacheck  Scan a file system for disk usage
 quotactl  Set disk quotas
R
 ram  ram disk device
 rcp  Copy files between two machines
 read  Read a line from standard input
 readarray  Read from stdin into an array variable
 readonly  Mark variables/functions as readonly
 reboot  Reboot the system
 rename  Rename files
 renice  Alter priority of running processes
 remsync  Synchronize remote files via email
 return  Exit a shell function
 rev  Reverse lines of a file
 rm  Remove files
 rmdir  Remove folders
 rsync  Remote file copy (Synchronize file trees)
S
 screen  Multiplex terminal, run remote shells via ssh
 scp  Secure copy (remote file copy)
 sdiff  Merge two files interactively
 sed  Stream Editor
 select  Accept keyboard input
 seq  Print numeric sequences
 set  Manipulate shell variables and functions
 sftp  Secure File Transfer Program
 shift  Shift positional parameters
 shopt  Shell Options
 shutdown  Shutdown or restart linux
 sleep  Delay for a specified time
 slocate  Find files
 sort  Sort text files
 source  Run commands from a file
 split  Split a file into fixed-size pieces
 ssh  Secure Shell client (remote login program)
 strace  Trace system calls and signals
 su  Substitute user identity
 sudo  Execute a command as another user
 sum  Print a checksum for a file
 suspend  Suspend execution of this shell
 symlink  Make a new name for a file
 sync  Synchronize data on disk with memory
T
 tail  Output the last part of file
 tar  Tape Archiver
 tee  Redirect output to multiple files
 test  Evaluate a conditional expression
 time  Measure Program running time
 times  User and system times
 touch  Change file timestamps
 top  List processes running on the system
 traceroute  Trace Route to Host
 trap  Run a command when a signal is set(bourne)
 tr  Translate, squeeze, and/or delete characters
 true  Do nothing, successfully
 tsort  Topological sort
 tty  Print filename of terminal on stdin
 type  Describe a command
U
 ulimit  Limit user resources
 umask  Users file creation mask
 umount  Unmount a device
 unalias  Remove an alias
 uname  Print system information
 unexpand  Convert spaces to tabs
 uniq  Uniquify files
 units  Convert units from one scale to another
 unset  Remove variable or function names
 unshar  Unpack shell archive scripts
 until  Execute commands (until error)
 uptime  Show uptime
 useradd  Create new user account
 usermod  Modify user account
 users  List users currently logged in
 uuencode  Encode a binary file
 uudecode  Decode a file created by uuencode
V
 v  Verbosely list directory contents (`ls -l -b’)
 vdir  Verbosely list directory contents (`ls -l -b’)
 vi  Text Editor
 vmstat  Report virtual memory statistics
W
 wait  Wait for a process to complete
 watch  Execute/display a program periodically
 wc  Print byte, word, and line counts
 whereis  Search the user’s $path, man pages and source files for a program
 which  Search the user’s $path for a program file
 while  Execute commands
 who  Print all usernames currently logged in
 whoami  Print the current user id and name (`id -un’)
 wget  Retrieve web pages or files via HTTP, HTTPS or FTP
 write  Send a message to another user
X
 xargs  Execute utility, passing constructed argument lists
 xdg-open  Open a file or URL in the user’s preferred application
Y
 yes   Print a string until interrupted

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How To Send Encrypted Email On Android

We all know that messages on WhatsApp are encrypted, but did you know that your emails and all the confidential information in them can also be password protected.

Here’s how you can encrypt your emails with this little Android hack here:

  • Start by downloading the GPGTools installer for your operating system and install the program on your device.
  • Once you’ve installed the above software, open your email client on your desktop. You will find the menu option named “OpenPGP” added to your email client.
  • Open this menu and click on the Key Management option. This will bring you to a new window with the option of Generate Button. Clicking on this will give you the option to create a New Keypair. The Generate OpenPGP Key Window lets you extract the key pair for your particular email address by filling it up. Create the desired password that will encrypt your email and hit the Generate Key button.
  • A right-click on the Key Management option helps you save the keys through “Export Keys to File.” Use this option to export your security keys.
  • Next step is to configure the email client. Once you open the email, click on the OpenPGP menu. Select the Sign Message and Encrypt Message options. In order to successfully encrypt the messages, you must select both of these options. Now all that’s is to write the message and send it.
  • Note: The receiver of this encrypted email can only open the same, only when he/she has the password for encrypted. So, make sure you hand them the password through a phone call or over a cup of coffee.

cmd command to check whether your computer is hack or not.

Command: netstat -ano