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Basic 50 linus command

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Basic 50 linus command

  1. 1. LINUX <ul><li>INTRODUCTION: </li></ul><ul><li>Linux is an operating system.It is similar to the unix os. </li></ul><ul><li>Basic linux command: </li></ul><ul><li>Ls :- This command is used to list all the files in the current working directory . Eg :- $ls </li></ul><ul><li>Rm :- This command is used to remove the file from the directory. Eg :- $rm filename </li></ul>
  2. 2. <ul><li>3.Rmdir :- This command is used remove directory . But it should not contain any file.Then only we can remove the directory </li></ul><ul><li>eg :-$rmdir directory name </li></ul><ul><li>4.Cat :- This command is used to create a file in the directory. </li></ul><ul><li>Eg :- $cat>filename (i.e.,)used to write the content in to the file. </li></ul><ul><li>eg :- $cat file .(i.e.,) used to display the content in the file </li></ul>
  3. 3. <ul><li>5. CD :- This command is used to change the current working directory. </li></ul><ul><li>Eg :- $cd </li></ul><ul><li>6.mv :- This command is also called rename command.it is used to move the content from the source file to the desigination file. </li></ul><ul><li>Eg :- $mv sourcefile desgination file </li></ul><ul><li>7.who :- This command is used to display the users who are currently logged on. </li></ul><ul><li>Eg :- $who </li></ul>
  4. 4. <ul><li>8.who am i :- This command is used to display the information about the user. </li></ul><ul><li>Eg:- $who am i </li></ul><ul><li>9.mk dir :- This command is used to create a new directory. </li></ul><ul><li>Eg :- $mkdir directoryname </li></ul><ul><li>10.Cp :- This command is used to copy the content of source file to the designation file. </li></ul><ul><li>Eg :-$cp source_file desgination_file </li></ul>
  5. 5. <ul><li>11.wall :- This command is used to send message to every user who are currently logged on. </li></ul><ul><li>Eg :- $wall message </li></ul><ul><li>12.bc :- Bc command is used for calculator </li></ul><ul><li>eg :- $bc </li></ul><ul><li>13.grep :- this command is used search a word or character or sentence in a file </li></ul><ul><li>Eg :- $grep word filenme </li></ul>
  6. 6. <ul><li>14.wc :- This command is used to count the number of character in a file </li></ul><ul><li>eg :- wc option filename </li></ul><ul><li>15.pwd :- this command is used to display current working directory. </li></ul><ul><li>Eg :- pwd </li></ul><ul><li>16. man:- </li></ul><ul><li>This magic command brings up the online Unix manual. Use it on each of </li></ul><ul><li>the commands below, today! Wonder what all the man command options are? </li></ul><ul><li>Try the&quot;man -k&quot; option. </li></ul>
  7. 7. <ul><li>17. more </li></ul><ul><li>This shows the contents of text files. Also you might be able to find“less” and “cat” which are similar commands. </li></ul><ul><li>18.whereis </li></ul><ul><li>Think there might be a nifty program hidden somewhere? Maybe a game youlove? This will find it for you. Similar commands are “find” and “locate.”Try them all for extra fun. </li></ul>
  8. 8. <ul><li>19. vi </li></ul><ul><li>An editing program. You’ll need it to make your own files and when you </li></ul><ul><li>start programming while in your shell account. You can use it to write a </li></ul><ul><li>lurid file for people to read when they finger you. Or try “emacs.” It’s </li></ul><ul><li>another editing program and IMHO more fun than vi. Other editing programs </li></ul><ul><li>you may find include “ed” (an ancient editing program which I have used to </li></ul><ul><li>write thousands of lines of Fortran 77 code), “ex,” “fmt,” “gmacs,” you </li></ul><ul><li>may find include “ed” (an ancient editing program which I have used to </li></ul><ul><li>write thousands of lines of Fortran 77 code), “ex,” “fmt,” “gmacs,” </li></ul><ul><li>“ gnuemacs,” and “pico.” </li></ul>
  9. 9. <ul><li>20. telnet </li></ul><ul><li>Telnet allows you to login remotely from a remote computer to a host </li></ul><ul><li>server running any unix or unix clone system. Other variation is called </li></ul><ul><li>RLOGIN/rlogin. A newer variation also allows you to login more securely </li></ul><ul><li>using the secure shell (SSH). </li></ul><ul><li>21. netstat </li></ul><ul><li>All sorts of statistics on your LAN, including all Internet connections. </li></ul><ul><li>For real fun, try “netstat -r” to see the kernel routing table. However, </li></ul><ul><li>be careful. I was teaching a friend the basics of summing up a Unix </li></ul><ul><li>system and I told her to do that and ‘ifconfig’. She was booted off the </li></ul><ul><li>system the next day for ‘hacker suspicion’ even though both are legitimate </li></ul><ul><li>commands for users.” </li></ul>
  10. 10. <ul><li>22. whois </li></ul><ul><li>Get lots of information on Internet hosts outside you LAN. </li></ul><ul><li>23. nslookup </li></ul><ul><li>Get a whole bunch more information on other Internet hosts. </li></ul><ul><li>24. dig </li></ul><ul><li>Even more info on other Internet hosts. Nslookup and dig are notredundant. Try to get a shell account that lets you use both. </li></ul>
  11. 11. <ul><li>25. finger </li></ul><ul><li>Not only can you use finger inside your LAN. It will sometimes get you </li></ul><ul><li>valuable information about users on other Internet hosts. </li></ul><ul><li>26.ping </li></ul><ul><li>Find out if a distant computer is alive and run diagnostic tests -- or </li></ul><ul><li>just plain be a meanie and clobber people with pings. (I strongly advise </li></ul><ul><li>*against* using ping to annoy or harm others.) </li></ul><ul><li>27.raceroute </li></ul><ul><li>Kind of like ping with attitude. Maps Internet connections, reveals </li></ul><ul><li>routers and boxes running firewalls. </li></ul>

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