Hi
#!/bin/sh
user=$1
if " -eq 0 ]
echo "No"
else
echo "Yes"
fi
I'm not quite sure whats wrong with this but I know its something silly.
Any ideas?
Thanks (9 Replies)
I have a file $I_FILE that I need to filter and store the 1st and the 9th columns in another file $O_FILE.
With this in Perl,
system ("awk -F, '{print \$1, \$9}' \$I_FILE | sed '\/^\$\/d' > O_FILE");
I get:
4096045055
The first line in I_FILE is:... (5 Replies)
system ("$ssh '$perf_stats' < temp_pipe 2>&1 &");
I need to start and interact with my executable defined by perf_stats on a remote machine but not change my command line to that of the remote machine. temp_pipe is a node created by mknod -f temp_pipe (6 Replies)
I executed the following command and got Arg List too long.
find /dir1/dir2/LOG_* -prune -type f -mtime +3 -exec echo {} \;
What's that about? (2 Replies)
I have a line that gets pulled from a database that has a variable number of fields, fields can also be of a variable size. Each field has a variable number of spaces between them so there is no 'defined' delimiter. The LastData block is always a single word.
What I want to do is delete the... (2 Replies)
Hi
I wish to capitalize the first letter or every word in a text file with:
gawk '{$0=gensub(/(\w)(\w*)/,toupper("\\1")"\\2","g");}' file.txtBut it doesn't work...:
target:
bla test Test TEST
yes nO Yes yes
restult:
bla test Test TEST
yes nO Yes yes
any idea? thanks (11 Replies)
Hi,
I tried to look up the issue i'm experiencing, but i'm confused what's wrong with my script.
After executing the script I'm getting the following error
expr: non-numeric argument
syntax error on line 1, teletype
After some research, it seems that the problem relates to bc.
I have... (1 Reply)
Discussion started by: nms
1 Replies
LEARN ABOUT REDHAT
expr
EXPR(1) FSF EXPR(1)NAME
expr - evaluate expressions
SYNOPSIS
expr EXPRESSION
expr OPTION
DESCRIPTION --help display this help and exit
--version
output version information and exit
Print the value of EXPRESSION to standard output. A blank line below separates increasing precedence groups. EXPRESSION may be:
ARG1 | ARG2
ARG1 if it is neither null nor 0, otherwise ARG2
ARG1 & ARG2
ARG1 if neither argument is null or 0, otherwise 0
ARG1 < ARG2
ARG1 is less than ARG2
ARG1 <= ARG2
ARG1 is less than or equal to ARG2
ARG1 = ARG2
ARG1 is equal to ARG2
ARG1 != ARG2
ARG1 is unequal to ARG2
ARG1 >= ARG2
ARG1 is greater than or equal to ARG2
ARG1 > ARG2
ARG1 is greater than ARG2
ARG1 + ARG2
arithmetic sum of ARG1 and ARG2
ARG1 - ARG2
arithmetic difference of ARG1 and ARG2
ARG1 * ARG2
arithmetic product of ARG1 and ARG2
ARG1 / ARG2
arithmetic quotient of ARG1 divided by ARG2
ARG1 % ARG2
arithmetic remainder of ARG1 divided by ARG2
STRING : REGEXP
anchored pattern match of REGEXP in STRING
match STRING REGEXP
same as STRING : REGEXP
substr STRING POS LENGTH
substring of STRING, POS counted from 1
index STRING CHARS
index in STRING where any CHARS is found, or 0
length STRING
length of STRING
+ TOKEN
interpret TOKEN as a string, even if it is a
keyword like `match' or an operator like `/'
( EXPRESSION )
value of EXPRESSION
Beware that many operators need to be escaped or quoted for shells. Comparisons are arithmetic if both ARGs are numbers, else lexicograph-
ical. Pattern matches return the string matched between ( and ) or null; if ( and ) are not used, they return the number of characters
matched or 0.
AUTHOR
Written by Mike Parker.
REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>.
COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
SEE ALSO
The full documentation for expr is maintained as a Texinfo manual. If the info and expr programs are properly installed at your site, the
command
info expr
should give you access to the complete manual.
GNU coreutils 4.5.3 February 2003 EXPR(1)