1) Yes, I've seen it a lot.
2) I'm not aware of such University either.
It's a matter of preference which in turn is driven by the known convention of capitalizing all environment variables and shell internal variables.
$CAT UUoC.txt | $GREP stuff | $CUT stuff is definitely more visible and less prone to confusion than $cat UUoC.txt | $grep stuff | $cut stuff.
It also helps when you want to throw a few extra flags into the command. Consider this for example:
I usually prefer GREP=$(which grep) or even GREP=$(which grep 2>/dev/null || echo :) if I want to be extra paranoid, but I only do this when writing shell scripts.
For compiled languages most people I know use #define kVariableName which seems to be pretty standard in C-based languages (I only use Obj-C though).
I need a unix script that check for even or odd. EXAMPLE::::
please enter the number to check: 12
the output: This is an even number
it has to have prompts. (2 Replies)
Hey Guys,,
Have just got started with Unix , I need UNIX Terminal to practise commands.
Does any website host such services ?
Happy Holidays... (9 Replies)
Hello, I have been working on a what I thought was a fairly simple script for installing a software kit on Linux and Unix
I am not new to scripting but am far from being fluent in sh scripting.
any assistance would be appreciated.
I have an odd bug occuring when executing the script.
When... (2 Replies)
Question is title, I don't understand why all examples I am reading return constants error values instead of just exiting under certain conditions... then back in main script test return value and exit if true, to me seems like a lot of extra typing and test conditions which can make for bulky and... (5 Replies)
Is it normal behavior for a shell script that terminates to terminate its parent shell when executed with the "." option?
For example, if I have the example script (we'll name it ex.sh):
#!/bin/sh
if
then
echo "Bye."
exit 2
fi
And I execute it like this:
>./ex.sh
It... (6 Replies)
The code I am using
#!/bin/sh
for FILE in *.cfg; do
awk '{
print;
if ($1 == "host_name") store_name = $2;
if ($1 == "register") { printf("\t\t parents\t\t\t %s-ilo\n", store_name); }
}' "$FILE" > ../new-files/hosts/$FILE
sed -i -e "s/notification_options.*/notification_options... (0 Replies)
I am creating a startup script for an application. This application's startup script is in bash. It will also need to call a perl script (which I will not be able to modify) for the application environment prior to calling the application. The problem is that this perl script creates a new shell... (5 Replies)
Hi folks,
So I wrote a script to run "top", "awk" out values fro the "top" and send the results to a data file.
I then set it to run in cron every 15 minutes.
Now I'm noticing that the script, and it's sub-commands are not always cleanly finishing and, in my investigations, I am also... (11 Replies)
Hi there. I've been forced by circumstance to write an expect script to handle password updates on a number of servers. There's a mix of Solaris 8, 9, 10, RedHat and Ubuntu. There's no chance the client will allow us to hook them up to a directory, so we have to make do.
This script is mostly... (0 Replies)
Hi all,
I have 2 server A and B. B is acting as standby for A.
The cronjobs running in A must not be run in B until failover.
The activation of cronjobs in B can be manual.
In server A, I am doing the following
1) create a cron/job script that does
"crontab -l >... (5 Replies)
Discussion started by: javanoob
5 Replies
LEARN ABOUT MINIX
roff
is a text formatter. Its input consists of the text to be out-
put, intermixed with formatting commands. A formatting commandis a line containing the control character followed by a twocharacter command name, and possibly one or more arguments. Thecontrol character is initially . (dot). The formatted output isproduced on standard output. The formatting commands are listedbelow, with being a number, being a character, and being a title.A + before n means it may be signed, indicating a positive ornegative change from the current value. Initial values for whererelevant, are given in parentheses.
.ad Adjust right margin.
.ar Arabic page numbers.
.br Line break. Subsequent text will begin on a new line.
.bl n Insert n blank lines.
.bp +n Begin new page and number it n. No n means +1.
.cc c Control character is set to c.
.ce n Center the next n input lines.
.de zz Define a macro called zz. A line with .. ends definition.
.ds Double space the output. Same as .ls 2.
.ef t Even page footer title is set to t.
.eh t Even page header title is set to t.
.fi Begin filling output lines as full as possible.
.fo t Footer titles (even and odd) are set to t.
.hc c The character c (e.g., %) tells roff where hyphens are permitted.
.he t Header titles (even and odd) are set to t.
.hx Header titles are suppressed.
.hy n Hyphenation is done if n is 1, suppressed if it is 0. Default is 1.
.ig Ignore input lines until a line beginning with .. is found.
.in n Indent n spaces from the left margin; force line break.
.ix n Same as .in but continue filling output on current line.
.li n Literal text on next n lines. Copy to output unmodified.
.ll +n Line length (including indent) is set to n (65).
.ls +n Line spacing: n (1) is 1 for single spacing, 2 for double, etc.
.m1 n Insert n (2) blank lines between top of page and header.
.m2 n Insert n (2) blank lines between header and start of text.
.m3 n Insert n (1) blank lines between end of text and footer.
.m4 n Insert n (3) blank lines between footer and end of page.
.na No adjustment of the right margin.
.ne n Need n lines. If fewer are left, go to next page.
.nn +n The next n output lines are not numbered.
.n1 Number output lines in left margin starting at 1.
.n2 n Number output lines starting at n. If 0, stop numbering.
.ni +n Indent line numbers by n (0) spaces.
.nf No more filling of lines.
.nx f Switch input to file f.
.of t Odd page footer title is set to t.
.oh t Odd page header title is set to t.
.pa +n Page adjust by n (1). Same as .bp
.pl +n Paper length is n (66) lines.
.po +n Page offset. Each line is started with n (0) spaces.
.ro Page numbers are printed in Roman numerals.
.sk n Skip n pages (i.e., make them blank), starting with next one.
.sp n Insert n blank lines, except at top of page.
.ss Single spacing. Equivalent to .ls 1.
.ta Set tab stops, e.g., .ta 9 17 25 33 41 49 57 65 73 (default).
.tc c Tabs are expanded into c. Default is space.
.ti n Indent next line n spaces; then go back to previous indent.
.tr ab Translate a into b on output.
.ul n Underline the letters and numbers in the next n lines.