Home > Syntax Error > Bash If Syntax Error Operand Expected

Bash If Syntax Error Operand Expected

Contents

Activate Hearthstone season chest cards? My girlfriend has mentioned disowning her 14 y/o transgender daughter A name for a well-informed person who is not believed? As you can see, it is also a little picky about spaces, but it wants the opposite of what expr wanted. Skeletal formula for carbon with two double bonds What could cause the throttle to stick in my Ford Ranger? Check This Out

And this should read the numbers and it should divide them up. Similarly, your 2nd conditional should read: if df -h | grep $BACKUP_DRIVE >/dev/null; then Finally, your 3rd conditional is correct in principle: it captures stdout output from the pipeline and compares Instead of saying: let LEFT=PWED - $PWTIME say: let LEFT=PWED-PWTIME But this is brittle. Blank space must appear between it and its first argument.

Bash Syntax Error Operand Expected Error Token Is

Mar 27 '12 at 0:14 add a comment| up vote 1 down vote For string comparisons you want to use double square brackets not parenthesis. What is the sh -c command? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

Try the following instead: if [[ $op == q ]]; then share|improve this answer edited Mar 27 '12 at 0:12 answered Mar 27 '12 at 0:06 Niklas B. 54.8k6121167 asked 1 year ago viewed 2012 times active 1 month ago Related 0why syntax error near unexpected token ' fi '1“syntax error: unexpected end of file” simple script0How do I solve Would you please upvote (upward triangle) or accept (checkmark) this answer so others will know it was useful? Expr: Syntax Error Can I use an HSA as investment vehicle by overcontributing temporarily?

Do COB LEDs usually need electrically insulating from the heatsink? Bash (error Token Is ") Join them; it only takes a minute: Sign up bash: syntax error using (( “$var” == “string” )) for comparisons up vote 1 down vote favorite I have this piece of Is 8:00 AM an unreasonable time to meet with my graduate students and post-doc? visdir=$(ls -l $tgtdir | grep ^d | wc -l) # Counts visible directories by using ls -l then filtering it with grep to find all lines starting with a d indicating

Here is what happens when we try to do floating point math with the shell: $let r=3.5 -bash: let: r=3.5: syntax error in expression (error token is ".5") $(( r = Integer Expression Expected linux bash share|improve this question edited Mar 27 '12 at 0:18 Charles Duffy 94.5k15102142 asked Mar 27 '12 at 0:04 FinalDestiny 4252822 1 As a rule, by the way, be To keep with script programming paradigm and allow for better math support, languages such Perl or Python would be better suited when math is desired. Don't use bash.

Bash (error Token Is ")

Least Common Multiple no outgoing connection via ipv4 Is the standard Canon 18-55 lens the same as 5 years ago? Limit involving exponentials and arctangent without L'Hôpital What to tell to a rejected candidate? Bash Syntax Error Operand Expected Error Token Is share|improve this answer edited Apr 9 '15 at 16:12 Eliah Kagan 55.9k15162255 answered Apr 9 '15 at 16:05 Florian Diesch 46.7k12105131 add a comment| up vote 1 down vote I found Syntax Error In Expression Error Token Is Join them; it only takes a minute: Sign up bash script error let: -: syntax error: operand expected (error token is “-”) up vote 2 down vote favorite Given the script

Verbs of buttons on websites Is the following extension of finite state automata studied? his comment is here In a GNU C macro envSet(name), what does (void) "" name mean? But inside a $(( )) construct, one does not escape *. But you have to treat the variables as strings. Invalid Arithmetic Operator (error Token Is

Browse other questions tagged linux bash or ask your own question. How to indicate you are going straight? As you can see, it is picky about spaces. $ z=5 $ z=`expr $z+1` ---- Need spaces around + sign. $ echo $z 5+1 $ z=`expr $z + 1` $ echo this contact form Why don't most major game engines use gifs for animated textures?

Problem? Bash Let My home country claims I am a dual national of another country, the country in question does not. As we know operator + takes two operands, but here y (the second one) is missing, thus the error operand expected (error token is “+ ”).

How to increase the population growth of the human race more hot questions question feed lang-sh about us tour help blog chat data legal privacy policy work here advertising info mobile

In fact, over the years, multiple facilities have been added to Unix to support working with numbers. Which requires more energy: walking 1 km or cycling 1 km at the same speed? You can only get away without rewriting if you know for sure that sh is actually bash on your system and you do not need the script to be portable (run Unary Operator Expected more hot questions question feed lang-sh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation

Don't you mean this instead? #!/bin/bash # define arrays hitStart[@] and hitEnd[@]... # define array array[@] #this loop is just for being sure array is loaded for ((k=0;k<${#hitEnd[@]};++k)); do echo "hitEnd Generally, you do not need [[ ... ]] for such tests at all, and instead simply use the command directly with if, possibly negated with !, and with output suppressed as When explicitly starting a script with an executable, use bash, not sh; in your example: bash /usr/local/src/backupcheck.sh Alternatively, with the shebang as is and if you want to be able to navigate here Is 8:00 AM an unreasonable time to meet with my graduate students and post-doc?

Problem? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed What type of sequences are escape sequences starting with "\033]" How does the pilot control the Dassault Rafale? This is free software with ABSOLUTELY NO WARRANTY.

Are there any 'smart' ejection seats? So what do you get by declaring a variable to be an integer? let also relaxes the normal rule of needing a $ in front of variables to be read. $ let z=5 $ echo $z 5 $ let z=$z+1 $ echo $z 6 Is there any corrections need to be done at point where variable $BACKUP_DRIVE mentioned?

Note, however, that this must be `, same as the opening backquote. expr¶ An old Unix program that can evaluate math is expr.

© Copyright 2017 gatoisland.com. All rights reserved.