1. The usage of curly braces {} and " " in displaying variable value - when we use which one?
echo "${filename}"
I have got into the habit of always putting quotes round string variables and strings because it prevents so many silly errors when a value contains spaces.
I have also got into the habit of using curly braces even when they are not strictly necessary because it makes the variable name totally unambiguous.
It also prevents errors like this:
2. use of back quote in value assignment to a variable and with expr command. For eg, the way I'm assigning tot_rec_count.
Quote:
act_rec_count=`expr ${tot_rec_count} - 1`
In ksh and Posix Shell whatever is between backticks is to be executed.
This more modern syntax is preferred. $((arithmetic)).
Also, I wouldn't bother with an array.
Quote:
set -A folders horizon mysteryshopper rcc reference
echo ${folders[@]}
for i in ${folders[@]}
This works the same and imho is easier to read and easier to type:
i want to get a substring from a string and used such shell script:
var_year=`expr substr "07132006" 5 4`
echo $var_year
but i got such error message: expr: syntax error. why?
Note: Kshell used on solaris 8. :confused: (5 Replies)
I found below script to check whether the variable is a digit in ksh.
############################
#!/bin/ksh
REPLY="3f"
if ]*\)'` != ${REPLY} && "${REPLY}" != "0" ]]
then
print "is digit\n"
else
print "not digit\n"
fi
############################
Although it works fine, but... (6 Replies)
I am trying to run the script bellow but its given me "syntax error at line 20 :'done' unexpected." error message"
can someone check to see if the script is ok? and correct me pls.
Today is my first day with scripting.
Gurus should pls help out
#!/bin/ksh
# Purpose: Check to see if file... (3 Replies)
I know I asked a similar question but I want to know if there is a regular expression existing that with a korn shell cmd, finds any timestamp data records in a file where it is greater then a timestamp in a shell variable ?
something like :
grep all records where it has a timestamp >... (5 Replies)
Hi Guys,
THis is the first time am using the expr expression.
I like to know how to write the expression a=(b\100)*a.
THis works fine if it gives without a bracket. the bracket should be present as i wanted to define the order of execution.
Help me out.
Thanks for your help in advance.... (2 Replies)
hello to everyone,
i am writing a shell script in unix and i use the following command:
lnum= cut -f 1 -d : aa
passline=`expr $lnum + 1`
echo "$passline"
with the following command i get the value that is stored in the first field of the file "aa" and i save it in the variable "lnum". i am... (2 Replies)
Hi All,
This is a piece of code from one of my scripts:
t1=`cat temp3.21447 | grep WEALTHTOUC_TRANS_20100409_233127.txt.txt.TRG | awk '{print $3}' | cut -c1-5`
t2=`cat temp3.21447 | grep WEALTHTOUC_TRANS_20100409_233127.txt.txt.TRG | awk '{print $5}' | cut -c1-5`
#t1=23:43... (5 Replies)
Hi All,
As per my knowledge in unix, my code looks fine. But still I am getting error (expr:syntax error). Please help me to resolve this error.
Script :
PRE_LBNO=0
PRE_DATE=0
TOT_PAY=0
TOT_REM=0
TOTAL=1
for Record_Type in `cut -c 1 Inputt.dat`
do
if ;
then
CURR_LBNO=` cut -c... (6 Replies)
This really puzzles me. The following code gives me the error 'expr: syntax error' when I try to do multi-line comment using here document
<<EOF
echo "Sum is: `expr $1 + $2`"
EOF
Even if I explicitly comment out the line containing the expr using "#", the error message would still exist... (3 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 DEBIAN
griffith
griffith(1)griffith(1)NAME
griffith - film collection manager
SYNOPSIS
griffith
DESCRIPTION
Griffith is a film collection manager. Adding items to the movie collection is as quick and easy as typing the film title and selecting a
supported source. Griffith will then try to fetch all the related information from the Web.
OPTIONS -h --help
Show usage information.
-D --debug
Run in debug mode.
-C --clean
find and delete orphan files in posters directory.
--check-dep
check dependencies - if all needed Python modules are installed, it prints nothting.
--sqlecho
Prints all SQL queries to standard output.
--home DIR
Set Griffith's home directory. Use this option if you want to change the default ~/.griffith
Printing movie list:
-c <expr> --cast=<expr>
cast field must contain <expr>
-d <expr> --director=<expr>
director field must contain <expr>
-o <expr> --original_title=<expr>
original title field must contain <expr>
-t <expr> --title=<expr>
title field must contain <expr>
-y <number> --year=<number>
movie must be released in year <number>
-s <columns> --sort=<columns>
set sort columns to <columns>. Example: --sort=o_title,number,director
SEE ALSO
Homepage: <http://www.griffith.cc/>
BUGS
If you want to help or report any bugs founded please visit homepage <http://www.griffith.cc/> or <https://bugs.launchpad.net/griffith>
AUTHORS
Griffith was written by Vasco Nunes and Piotr OA1/4arowski. See the AUTHORS and THANKS files for a list of other contributors.
Copyright (C) 2005-2008 Vasco Nunes <vasco.m.nunes@gmail.com>, Piotr OA1/4arowski <ozarow+griffith@gmail.com>,
This man page was written by Piotr Ozarowski
Dec 20, 2006 griffith(1)