OK, first thing first, you're also trying (in a syntactically incorrect way) to append STDOUT to the log too (which would never actually assign anything to the variable.... if the whole thing was enclosed in backticks... ).
we have two alpha stations which are connected on two sides on the same wan (64k leased line), here is one problem described as follow.
when i do a ftp to copy a file form one to another, an error mesg shown and the file lenth is 0 at last.
diamond> ftp 192.168.50.1
Connected to... (1 Reply)
I have a Dell Latitude c840 that runs SuSE 8.0 Enterprise server that hangs on bootup on trying to create /var/log/boot.msg. It boots in rescue mode just fine. I've tried deleting the old boot.msg file that was in there, but that did no good.
Does anyone have any advice/know of a website with... (3 Replies)
Sometimes, for any reason, the UX System sends messages to /var/mail/root and/or to Error Log of the guardian.
I'll appreciating if you help me to configure so that those messages are also sent to the System Administrator's e-mail address.
Regards
Gege (1 Reply)
mit@mydomain.com
here is the latest error message:
There was a problem logging onto your mail server. Your Password was rejected. Account: 'mit@mydomain.com', Server: 'mail.mit.com', Protocol: POP3, Server Response: '-ERR Logon failure: unknown user name or bad password.', Port: 110,... (2 Replies)
Hi,
I have a script to compare 2 files.
file1=$1
file2=$2
num_of_records_file1=`awk ' END { print NR } ' $file1`
num_of_records_file2=`awk ' END { print NR } ' $file2`
i=1
while
do
sed -n "$i"p $file1 > file1_temp
sed -n "$i"p $file2 > file2_temp
diff file1_temp... (5 Replies)
Hi friends,
Please suggest a solution for this.
A script has following things.
echo "Enter P for PML"
echo "Enter V for VVL"
echo "Enter L for LNL"
echo "Enter G for GDL"
read choice
echo ${choice} >> LOG_Daily.txt
if operator enters anything other that P/V/L/G it should show an... (8 Replies)
#!/bin/ksh -x
cd /tmp/tj
ftp -n servername.com << DONE
user username password
as
put test.log
quit
close
DONE
echo "testing..."
sh -x scriptname, and it shows all, but username, as, put, quit, close, DONE.
how can i see those ? (1 Reply)
Hi guys,
been scratching round the forums and my mountain of resources.
Maybe I havn't read deep enough
My question is not how sed edits a stream and outputs it to a file, rather something like this below:
I have a .txt with some text in it :rolleyes:
abc:123:xyz
123:abc:987... (7 Replies)
I'm trying to complete a bash script to capture if an external webcam is active in a video conference session. Some users will switch the camera to the built-in MAC camera. When this happens I want to trigger a set of events.
Things tried: reviewed the console.app to look for patterns on when... (6 Replies)
Discussion started by: dallas88
6 Replies
LEARN ABOUT OPENDARWIN
expr
EXPR(1) BSD General Commands Manual EXPR(1)NAME
expr -- evaluate expression
SYNOPSIS
expr expression
DESCRIPTION
The expr utility evaluates expression and writes the result on standard output.
All operators are separate arguments to the expr utility. Characters special to the command interpreter must be escaped.
Operators are listed below in order of increasing precedence. Operators with equal precedence are grouped within { } symbols.
expr1 | expr2
Returns the evaluation of expr1 if it is neither an empty string nor zero; otherwise, returns the evaluation of expr2.
expr1 & expr2
Returns the evaluation of expr1 if neither expression evaluates to an empty string or zero; otherwise, returns zero.
expr1 {=, >, >=, <, <=, !=} expr2
Returns the results of integer comparison if both arguments are integers; otherwise, returns the results of string comparison using
the locale-specific collation sequence. The result of each comparison is 1 if the specified relation is true, or 0 if the relation
is false.
expr1 {+, -} expr2
Returns the results of addition or subtraction of integer-valued arguments.
expr1 {*, /, %} expr2
Returns the results of multiplication, integer division, or remainder of integer-valued arguments.
expr1 : expr2
The ``:'' operator matches expr1 against expr2, which must be a regular expression. The regular expression is anchored to the begin-
ning of the string with an implicit ``^''. expr expects "basic" regular expressions, see re_format(7) for more information on regu-
lar expressions.
If the match succeeds and the pattern contains at least one regular expression subexpression ``(...)'', the string corresponding to
``1'' is returned; otherwise the matching operator returns the number of characters matched. If the match fails and the pattern
contains a regular expression subexpression the null string is returned; otherwise 0.
Parentheses are used for grouping in the usual manner.
EXAMPLES
1. The following example adds one to the variable a.
a=`expr $a + 1`
2. The following example returns the filename portion of a pathname stored in variable a. The // characters act to eliminate ambiguity
with the division operator.
expr //$a : '.*/(.*)'
3. The following example returns the number of characters in variable a.
expr $a : '.*'
DIAGNOSTICS
The expr utility exits with one of the following values:
0 the expression is neither an empty string nor 0.
1 the expression is an empty string or 0.
2 the expression is invalid.
STANDARDS
The expr utility conforms to IEEE Std 1003.2 (``POSIX.2'').
BSD July 3, 1993 BSD