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Full Discussion: Very New User
Top Forums UNIX for Dummies Questions & Answers Very New User Post 699 by Neo on Monday 8th of January 2001 06:06:01 PM
Old 01-08-2001
If you are going to learn to program in C you have to decide which platform (OS) you are going to learn on. If you decide to learn on UNIX, then you must learn the basic UNIX commands to navigate the filesystems, execute, change permissions, and edit. You must learn to install files, archive, login, use the linker, use the compiler and more.

Hence, as PxT says, C is a programming language, UNIX is an operating platform. You learn both. If you don't know either, you must learn some basic UNIX commands first before you start to program and edit (if you plan to play on the platform).

In fact, I learned just like you. My first assignment in UNIX was to program in C. I did not know either and learned them both, step-by-step, minute-by-minute. Learning to program in C in the UNIX environment is a great way to get started. Don't forget to try using the UNIX system calls and interprocess communication routines. You are about to enter a world only limited by your imagination.

Quote:

Don't try to guess the future.... create the future!
I read the above idea today researching theory on 'managing complexity' in the rapidly changing world of IT. What a great quote!

[Edited by Neo on 01-08-2001 at 06:10 PM]
 

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log(8)							      System Manager's Manual							    log(8)

NAME
log - Records input and output from a program SYNOPSIS
/usr/sbin/log <logfile> <command> OPERANDS
The file in which to record the interaction being logged. The command to execute. DESCRIPTION
The log program runs <command> and logs the input to and output from <command> to the <logfile> file. Input and output are logged until <command> exits, the log program exits, and the exit status of <command> is returned. The log program is used by the system installation procedure and the it(8) command to create the /var/adm/smlogs/install.log and /var/adm/smlogs/it.log installation log files. RESTRICTIONS
Because the log program is used in the installation standalone environment, program size was the greatest concern in its implementation. The log program does not search for the PATH variable to locate <command> and error messages are terse. The log program causes <command> to take standard input from and write standard output and standard error to UNIX pipes. Some commands will not be able to operate in this environment; therefore, it is suggested that you use the script(1) command instead. UNIX shells will not issue prompts when run from log unless the shell is started with an explicit interactive switch (-i for most shells). For example, log foo.tmp /sbin/sh -i In the previous example, foo.tmp is the name of <logfile>. The log program intercepts end-of-file (usually Ctrl/d). Therefore programs which normally receive end-of-file as an exit command must exit by some other means. ERRORS
Log open error Explanation: The log program was unable to open <logfile>. Verify that the directory exists and that ownerships and permissions are set correctly. Exec Error Explanation: The log program was unable to execute <command>. Verify that you specified a full pathname for <command> and that <command> is an exe- cutable file. Fork Error Explanation: The log program was unable to create one of the processes it requires to log data. SEE ALSO
Commands: it(8), script(1) log(8)
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