sh is "generic" today. More safety is tell the shell from group ksh, bash, dash. Then you have maybe that shell.
But next will work in any posix shell and bourne shell
Hello,
I kinda newbie in unix so I would like so help.I know that there is a command that compares two integer numbers test (eg. #$1=0 ).I would like to know if it is possible to compare any number with another (eg. 2.3=0 or 3.7!=0 4.5>2.2).
Thank you in advance. (1 Reply)
Hi,
Can anyone explain what is going on here:
michael-browns-powerbook-g4-15:~ msb65$ start=-1
michael-browns-powerbook-g4-15:~ msb65$ stop=1
michael-browns-powerbook-g4-15:~ msb65$ if ; then echo hello; fi
-bash: ; then echo hello; fi
hello
Are you not allowed to compare negative... (6 Replies)
Hi,
I am writing a BASH shell script. I would like to construct an IF statement that allows me to determine if a variable is between -180 and 180. Example:
if ; then
echo 'WEST NOT WITHIN BOUNDS'
fi
However, I believe the negative sign is causing errors. What is the proper BASH... (6 Replies)
Hello,
I have a command that I need to supply a negative number as a parameter; how do I do this? I have tried giving it with double quotes, "", but no avail.
Thanks,
Gussi (3 Replies)
Hello,
For my weather station I have made a little perl script to put the data into cacti. The next problem I have.
I can only get positive numbers or negative numbers.
What do I do:
Though a shell scrip I call the perl script.
Shell script:
#!/bin/sh
cat data.txt | stats.pl
Perl... (4 Replies)
Let, I have three numbers
+00123.25
-00256.54
+00489.23
I need to sum up all those three numbers, after storing them in three variables (say var1, var2, var3).
I used both expr and BC, but they didn't work for me.
But, I am not able to sum up them, as I don't have any idea how to... (13 Replies)
Dear All,
I have to split a tab delimited file in two files based on the presence of a positive or negative in column number 9 , for example
file:
A 1 5 erg + 6766 0.9889 0.9817 9.01882 erg inside upstream
B 1 8 erg2 + 6766 0.9889 0.9817 -9.22 erg2 inside... (3 Replies)
Greetings. I have a three column file, and there are some numbers in the second column that are <1. However I need all numbers to be positive, thus need to replace all those numbers with just one. I feel like there must be a simple way to use awk to find these numbers and sed to replace but can't... (5 Replies)
I have a file that is pipe delimited and in Column F they have number values, both positive and negative. I need to take the one file I am starting with and split it into two separate files based on negative and positive numbers. What is the command to do so? And then I need to also transfer... (4 Replies)
Discussion started by: cckaiser15
4 Replies
LEARN ABOUT DEBIAN
surfraw-update-path
SURFRAW-UPDATE-PATH(1) User Contributed Perl Documentation SURFRAW-UPDATE-PATH(1)NAME
surfraw-update-path - updates PATH in shell config files
SYNOPSIS
surfraw-update-path [-add] [-remove] [-check] [-sys] [-all] [-help] [-shell=SHELL]
DESCRIPTION
surfraw-update-path adds the surfraw elvi directory (/usr/lib/surfraw) to your PATH in your shell's config file.
Currently it supports bash, sh, csh, tcsh, ash, dash, ksh, pdksh, zsh, rc, and es
Don't forget to login again or source your login files for it to take effect.
OPTIONS -check
Checks to see if the surfraw config code is present. This is the default.
-add
Adds the surfraw config code.
-remove
Removes the surfraw config code
-sys
Updates the system-wide shell config instead of the user. Must be done as root.
-shell=SHELL
Selects the shell to configure. Defaults to the value of the $SHELL environment variable.
Currently supported shells are:
sh, ash, bash, dash, csh, tcsh, ksh, pdksh, zsh, rc, and es.
-all
Attempts to configure the startup files for all known shells
-help
Gives a usage message
RETURN VALUE -check returns 0 if the surfraw code is present in the file, 1 if it is not found, or 2 on error.
All other options return 0 on success, or 2 on error.
ENVIRONMENT
SHELL
Used to determine which shell to configure, if -shell is not given.
HOME
Used to find users config files.
ENV Used by posix-compliant shells to specify a startup rc file.
ZDOTDIR
Used to find user config files for zsh. If not set, defaults to HOME.
SEE ALSO surfraw(1), sh(1), ash(1), bash(1), dash(1), csh(1), tcsh(1), ksh(1), pdksh(1), zsh(1), rc(1), es(1)AUTHOR
Ian Beckwith <ianb@erislabs.net>
perl v5.12.4 2011-07-12 SURFRAW-UPDATE-PATH(1)