Do Some Basic UNIX: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
m (23 revisions) |
||
| (9 intermediate revisions by 2 users not shown) | |||
| Line 4: | Line 4: | ||
[http://www.mayo.edu/bir/bir/tutor.html Mayo], | [http://www.mayo.edu/bir/bir/tutor.html Mayo], | ||
[http://www.unixgeeks.org/security/newbie/unix/ UnixGeeks.org] or | [http://www.unixgeeks.org/security/newbie/unix/ UnixGeeks.org] or | ||
[http://www.isu.edu/departments/comcom/unix/workshop/unixindex.html Idaho state]</h3> | [http://www.isu.edu/departments/comcom/unix/workshop/unixindex.html Idaho state] and, of course, the [http://www.gnu.org/software/bash/manual/bashref.html bash manual]</h3> | ||
| Line 16: | Line 16: | ||
<td bgcolor="paleGoldenrod"><font face="verdana,arialverdana,arial">man</font> <i>function</i></td> | <td bgcolor="paleGoldenrod"><font face="verdana,arialverdana,arial">man</font> <i>function</i></td> | ||
<td>show the manual page for a function</td> | <td>show the manual page for a function</td> | ||
</tr> | |||
<tr> | |||
<td bgcolor="paleGoldenrod"><font face="verdana,arialverdana,arial">id</font></td> | |||
<td>list your personal user id, username, and the groups you belong to.</td> | |||
</tr> | |||
<tr> | |||
<td bgcolor="paleGoldenrod"><font face="verdana,arialverdana,arial">id <i>username</i></font></td> | |||
<td>list <i>username</i>'s id, username, and the groups they belong to.</td> | |||
</tr> | </tr> | ||
| Line 61: | Line 71: | ||
<dd type="1">6 - read and write (not execute) | <dd type="1">6 - read and write (not execute) | ||
<dd type="1">5 - read and execute (not write) | <dd type="1">5 - read and execute (not write) | ||
</dl> | |||
<font face="courier">chmod 777 <i>filename</i></font> | <font face="courier">chmod 777 <i>filename</i></font> | ||
<ul> | <ul> | ||
| Line 67: | Line 77: | ||
</ul> | </ul> | ||
<font face="courier">chmod 744 <i>filename</i></font> | |||
<ul> | <ul> | ||
<li type="1">owner read, write, execute</li> | <li type="1">owner read, write, execute</li> | ||
| Line 78: | Line 88: | ||
</ul> | </ul> | ||
<font face="courier">chmod 700 <i>filename</i></font | <font face="courier">chmod 700 <i>filename</i></font> | ||
<ul> | <ul> | ||
<li type="1">owner read, write execute | <li type="1">owner read, write execute | ||
| Line 86: | Line 96: | ||
</td> | </td> | ||
</tr> | </tr> | ||
<tr> | |||
<td bgcolor="paleGoldenrod"><font face="verdana,arial">chgrp <i>groupname filename</i></font></td> | |||
<td>change the group that has access to the file. For example: <i>chgrp bookheimergroup myWork</i> </td> | |||
</tr> | |||
<tr> | <tr> | ||
| Line 136: | Line 150: | ||
<td bgcolor="paleGoldenrod"><font face="verdana,arial">*</font></td> | <td bgcolor="paleGoldenrod"><font face="verdana,arial">*</font></td> | ||
<td>unix wild card - matches all file names (except those beginning with '.') | <td>unix wild card - matches all file names (except those beginning with '.') | ||
e.g. <font face="verdana,arial">rm *</font> will remove all files from the current directory! | |||
<b><font color="#FF0000" size="+1">You will absolutely never type 'rm *'. Ever.</font></b> | |||
<i>Always type something like</i><font face="verdana,arial"> "ls *" </font>first to verify what such a wildcard will match | |||
</td> | </td> | ||
Latest revision as of 03:13, 16 January 2014
Some basic unix commands
Want more? Try the excellent tutorials at FreeEngineer.org, Mayo, UnixGeeks.org or Idaho state and, of course, the bash manual
| Command | Meaning |
|---|---|
| man function | show the manual page for a function |
| id | list your personal user id, username, and the groups you belong to. |
| id username | list username's id, username, and the groups they belong to. |
| top | shows currently running processes - do not leave this running for more than 30sec (ctrl-c) |
| ps | show the names of all running processes |
| mkdir dir_name | create a sub-directory of the current directory |
| rmdir dir_name | remove a directory. You must remove files in the directory first. |
| cp source dest | copy a file or directory from source to dest |
| rm file_name | remove a file (permanent!) |
| chmod xxx file_name | change the file permissions:
Three numbers indicate the permissions for the owner, the group and the world.
|
| chgrp groupname filename | change the group that has access to the file. For example: chgrp bookheimergroup myWork |
| ls | list contents of current directory |
| ls -l | list the contents of the directory (long form, showing sizes) |
| ls dir_name | list the contents of the named directory |
| cd dir_name | change to the named directory |
| pwd | show the name of the current directory |
| . | the current directory |
| .. | the parent directory of this directory |
| more file_name | print out the contents of the named (text) file |
| df | show the free space on the present disk |
| du | show the disk usage on the system |
| * | unix wild card - matches all file names (except those beginning with '.')
e.g. rm * will remove all files from the current directory! You will absolutely never type 'rm *'. Ever. Always type something like "ls *" first to verify what such a wildcard will match |
| xemacs file_name textedit file_name |
These are all text editors that are found commonly on unix systems. Most people seem to prefer xemacs, but each has its adherents. |
| ? | matches any single character |