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Full Discussion: Can't upload to red hat 7.3
Special Forums Hardware Filesystems, Disks and Memory Can't upload to red hat 7.3 Post 31821 by Neo on Wednesday 13th of November 2002 06:15:01 PM
Old 11-13-2002
When you make a mistake like this you need to 'stop thinking GUI' and get to the command line:

(1) What is the user ID your web server runs when users are connecting? Hint:

Code:
ps aux | grep httpd

(2) Does this user ID have executable permissions for the PERL or other CGI scripts?

(3) Does this user ID have read permissions into the HTTP document tree?

These are the things that the author of your cryptic note were trying to point out, and when you have these types of problems, you must 'leave your GUI' on the sidelines and learn to navigate the shell and use basic shell commands like cd, ls, pwd, find, chmod, chown, ps, grep, more and do some snooping around the fun and friendly filesystem.

FWIW: In over 15 years of UNIX and Linux work, I've never used a tool like Webmin.... it is just too much fun and a lot faster (when you get used to it) to command the shell !!
 

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INTRO(1)							Linux User's Manual							  INTRO(1)

NAME
intro - Introduction to user commands DESCRIPTION
Section 1 of the manual describes user commands and tools, for example, file manipulation tools, shells, compilers, web browsers, file and image viewers and editors, and so on. All commands yield a status value on termination. This value can be tested (e.g., in most shells the variable $? contains the status of the last executed command) to see whether the command completed successfully. A zero exit status is conventionally used to indicate suc- cess, and a nonzero status means that the command was unsuccessful. (Details of the exit status can be found in wait(2).) A nonzero exit status can be in the range 1 to 255, and some commands use different nonzero status values to indicate the reason why the command failed. NOTES
Linux is a flavor of Unix, and as a first approximation all user commands under Unix work precisely the same under Linux (and FreeBSD and lots of other Unix-like systems). Under Linux there are GUIs (graphical user interfaces), where you can point and click and drag, and hopefully get work done without first reading lots of documentation. The traditional Unix environment is a CLI (command line interface), where you type commands to tell the computer what to do. That is faster and more powerful, but requires finding out what the commands are. Below a bare minimum, to get started. Login In order to start working, you probably first have to login, that is, give your username and password. See also login(1). The program login now starts a shell (command interpreter) for you. In case of a graphical login, you get a screen with menus or icons and a mouse click will start a shell in a window. See also xterm(1). The shell One types commands to the shell, the command interpreter. It is not built-in, but is just a program and you can change your shell. Every- body has her own favorite one. The standard one is called sh. See also ash(1), bash(1), csh(1), zsh(1), chsh(1). A session might go like knuth login: aeb Password: ******** % date Tue Aug 6 23:50:44 CEST 2002 % cal August 2002 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 % ls bin tel % ls -l total 2 drwxrwxr-x 2 aeb 1024 Aug 6 23:51 bin -rw-rw-r-- 1 aeb 37 Aug 6 23:52 tel % cat tel maja 0501-1136285 peter 0136-7399214 % cp tel tel2 % ls -l total 3 drwxr-xr-x 2 aeb 1024 Aug 6 23:51 bin -rw-r--r-- 1 aeb 37 Aug 6 23:52 tel -rw-r--r-- 1 aeb 37 Aug 6 23:53 tel2 % mv tel tel1 % ls -l total 3 drwxr-xr-x 2 aeb 1024 Aug 6 23:51 bin -rw-r--r-- 1 aeb 37 Aug 6 23:52 tel1 -rw-r--r-- 1 aeb 37 Aug 6 23:53 tel2 % diff tel1 tel2 % rm tel1 % grep maja tel2 maja 0501-1136285 % and here typing Control-D ended the session. The % here was the command prompt -- it is the shell's way of indicating that it is ready for the next command. The prompt can be customized in lots of ways, and one might include stuff like username, machine name, current direc- tory, time, etc. An assignment PS1="What next, master? " would change the prompt as indicated. We see that there are commands date (that gives date and time), and cal (that gives a calendar). The command ls lists the contents of the current directory -- it tells you what files you have. With a -l option it gives a long listing, that includes the owner and size and date of the file, and the permissions people have for reading and/or changing the file. For example, the file "tel" here is 37 bytes long, owned by aeb and the owner can read and write it, others can only read it. Owner and permissions can be changed by the commands chown and chmod. The command cat will show the contents of a file. (The name is from "concatenate and print": all files given as parameters are concate- nated and sent to "standard output", here the terminal screen.) The command cp (from "copy") will copy a file. On the other hand, the command mv (from "move") only renames it. The command diff lists the differences between two files. Here there was no output because there were no differences. The command rm (from "remove") deletes the file, and be careful! it is gone. No wastepaper basket or anything. Deleted means lost. The command grep (from "g/re/p") finds occurrences of a string in one or more files. Here it finds Maja's telephone number. Pathnames and the current directory Files live in a large tree, the file hierarchy. Each has a pathname describing the path from the root of the tree (which is called /) to the file. For example, such a full pathname might be /home/aeb/tel. Always using full pathnames would be inconvenient, and the name of a file in the current directory may be abbreviated by only giving the last component. That is why "/home/aeb/tel" can be abbreviated to "tel" when the current directory is "/home/aeb". The command pwd prints the current directory. The command cd changes the current directory. Try "cd /" and "pwd" and "cd" and "pwd". Directories The command mkdir makes a new directory. The command rmdir removes a directory if it is empty, and complains otherwise. The command find (with a rather baroque syntax) will find files with given name or other properties. For example, "find . -name tel" would find the file "tel" starting in the present directory (which is called "."). And "find / -name tel" would do the same, but starting at the root of the tree. Large searches on a multi-GB disk will be time-consuming, and it may be better to use locate(1). Disks and Filesystems The command mount will attach the file system found on some disk (or floppy, or CDROM or so) to the big file system hierarchy. And umount detaches it again. The command df will tell you how much of your disk is still free. Processes On a Unix system many user and system processes run simultaneously. The one you are talking to runs in the foreground, the others in the background. The command ps will show you which processes are active and what numbers these processes have. The command kill allows you to get rid of them. Without option this is a friendly request: please go away. And "kill -9" followed by the number of the process is an immediate kill. Foreground processes can often be killed by typing Control-C. Getting information There are thousands of commands, each with many options. Traditionally commands are documented on man pages, (like this one), so that the command "man kill" will document the use of the command "kill" (and "man man" document the command "man"). The program man sends the text through some pager, usually less. Hit the space bar to get the next page, hit q to quit. In documentation it is customary to refer to man pages by giving the name and section number, as in man(1). Man pages are terse, and allow you to find quickly some forgotten detail. For newcomers an introductory text with more examples and explanations is useful. A lot of GNU/FSF software is provided with info files. Type "info info" for an introduction on the use of the program "info". Special topics are often treated in HOWTOs. Look in /usr/share/doc/howto/en and use a browser if you find HTML files there. SEE ALSO
standards(7) COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2007-11-15 INTRO(1)
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