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CS320 Web and Internet Programming Linux Basics

CS320 Web and Internet Programming Linux Basics. Chengyu Sun California State University, Los Angeles. Directory Structure. root directory / current directory . Parent directory .. home directory ~. Moving Around. cd / absolute / path cd relative / path cd.

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CS320 Web and Internet Programming Linux Basics

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  1. CS320 Web and Internet ProgrammingLinux Basics Chengyu Sun California State University, Los Angeles

  2. Directory Structure • root directory / • current directory . • Parent directory .. • home directory ~

  3. Moving Around • cd/absolute/path • cd relative/path • cd

  4. Directory and File Commands • Find current directory: pwd • List directory content: ls • list all files -a • list files in long format –l • Copy files • cp file1 file2 • cp file1 file2 dir • Move/rename file • mv file1 file2 • mv file1 file2 dir

  5. Some Useful Commands • Reference the manual pages • man <command> • Create command aliases • alias dir=“ls –lX”

  6. Console vi, vim emacs pico With X Forwarding gvim xemacs gedit IDEs Netbeans Eclipse KDevelop Choices of Editors

  7. Environment Variables • Set an environment variable X • export X=“something” • Show an environment variable X • echo$X • Common environment variables • $HOME, $PATH • $JAVA_HOME

  8. File Permissions • Three categories of users: • owner, group, other • Three privileges • read, write, execute

  9. File Permission Example -rw------- 1 cs320stu31 cs320stu31 116 Sep 24 14:53 .mysql_history drwx------ 2 cs320stu31 cs320stu31 4096 Sep 24 14:43 .ssh -rw------- 1 cs320stu31 cs320stu31 790 Sep 24 14:52 .viminfo -rw------- 1 cs320stu31 cs320stu31 63 Sep 28 10:09 .Xauthority drwxr-xr-x 2 cs320stu31 cs320stu31 4096 Sep 24 14:32 .xemacs

  10. Change File Permissions • chmod

  11. .bashrc • Executed every time you log into your account • A good place to put some commands that help you set up your environment

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