Linux Common Command collation

1. How to add a user to the Sudoer list:

chmod +w /etc/echo'mirandam all= (All) nopasswd:all' >>/etc/chmod -w /etc/

2. For loop Example:

    for in $ (find ' *.xml '-do    Done

3. String segmentation:

INPUT == 'echocut'_'2echo  //

4. Replace the regular expression of the string:

Echo Caster_3. 1. 1_rc_build.svn.150718_java. Tar sed ' s/_rc_build/.svn/. [0-9]*_'

5. Wget Password and authentication:

wget --http-user=user--http-passwd=secret http://

6. Restart the Network service:

7. Install Subversion:

Yum Install Subversion MOD_DAV_SVN

8. Shell script Parameters Get:

$//Command name
$//First parameter
$ A//second parameter
$ A//third parameter, and so on
$#//number of all parameters
[Email protected]//list of all parameters

9. Obtain the Linux/unix core version number:

uname -// or (more information will be printed):cat

Operating level of Linux:

RunLevel 0: Shutdown, do not set as default run level
RunLevel 1: Single-user mode
RunLevel 2: Multi-user mode with no NFS
RunLevel 3: Full multi-user mode, same as 2 if no network connection
RunLevel 4: Unused
RunLevel 5: Graphical user mode (RunLevel 3 + X Window System "graphical user Interface").
RunLevel 6: Reboot, do not set as default run level

11. Dynamically view the content at the end of the text file:

tail -f/etc/text. file

12, unzip the BZ2 format compressed file:

Bzcat gcc-4.1. 2. Tar Tar //  targcc-4.1. 2. tar. bz2

13. Check the byte order of the platform (if you don't know what the byte order is: http://en.wikipedia.org/wiki/Endianness):

Echo Head cut -f2-d""cut -c6

14. Retrieve the number of occurrences of a word in a file:

:%s/pattern//gn