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Bash For Loop Syntax Error Operand Expected


Try our newsletter Sign up for our newsletter and get our top new questions delivered to your inbox (see an example). The backslash preceding the ! Meaning of Guns and ghee Did Donald Trump call Alicia Machado "Miss Piggy" and "Miss Housekeeping"? n=$((n * temp)) works. –Eliah Kagan Apr 9 '15 at 18:16 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign Check This Out

crts View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by crts 08-14-2011, 08:33 PM #14 grail LQ Guru Registered: Sep 2009 Location: How to increase the population growth of the human race Force Microsoft Word to NEVER auto-capitalize the name of my company Can a creature benefit from differently typed speed bonuses all Created using Sphinx 1.4.4. Code: # custom prompt function create-prompt-infobar { local i=0 if (($COLUMNS >= (${#PWD} + ${#?} + 11))); then echo -n "$PWD" for ((i=0; i<($COLUMNS-${#PWD}-${#?}-10); i++)); do echo ""; done echo -n

Bash Syntax Error Operand Expected (error Token Is )

Convince people not to share their password with trusted others Subtraction with a negative result Force Microsoft Word to NEVER auto-capitalize the name of my company Is there a good way I'm aware of the difference between ' and ", but if you want create-prompt-infobar to be evaluated every time the prompt comes up it needs to be in single quotes. Join them; it only takes a minute: Sign up Bash 'for' loop syntax?

what is the difference between \twocolumn and \documentclass[twocolumn]{book} What to tell to a rejected candidate? Maybe a typo crept in somewhere earlier in your script? I construct those properly and before going into for loop, I do echo them to be sure everything is ok with arrays. Expr: Syntax Error If not, why?

Please check. –Rahul Gohrani Apr 9 '15 at 17:01 I updated my post, please check ;-) –Helio Apr 9 '15 at 17:39 I shall check this. Syntax Error Operand Expected (error Token Is = ) up vote -2 down vote favorite When running the script below, I get an error: The script is: clear echo "Enter a num" read num if [ "$num" -ge 0]; then When taking passengers, what should I do to prepare them? If those answers do not fully address your question, please ask a new question.

That is, you must have blank space before the trailing ] as well as after the leading [. Integer Expression Expected In this situation and many like it, the built-in ! 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 command.

  1. Subtraction with a negative result no outgoing connection via ipv4 What does Sauron need with mithril?
  2. Integral using residue theorem complex analysis Do COB LEDs usually need electrically insulating from the heatsink?
  3. So here I see the same issue that MTK refers to but with a simpler test.
  4. You have *\ in an expression for arithmetic expansion, which yields the error bash: n *\ temp: syntax error: operand expected (error token is "\ temp").
  5. as the first line of create-prompt-infobar.
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  7. Why write an entire bash script in functions?
  8. Should indoor ripened tomatoes be used for sauce?
  9. The expanded contents are not expanded again.
  10. Either option is perfectly valid. –Keith Thompson May 30 '14 at 19:24 | show 5 more comments up vote 1 down vote At some point, it's trying to evaluate the $BACKUP_DRIVE

Syntax Error Operand Expected (error Token Is = )

Browse other questions tagged bash or ask your own question. Why? Bash Syntax Error Operand Expected (error Token Is ) Script is: #!/bin/sh BACKUP_DRIVE='/backup' if [[ "$( grep $BACKUP_DRIVE /etc/fstab | awk '{print $2}')" -ne "0" ]]; then if [[ "$( df -h | grep $BACKUP_DRIVE | awk '{print $6}')" -ne Bash (error Token Is ") share|improve this answer answered Apr 9 '15 at 17:50 Rahul Gohrani 12 As written, that code contains a mistake and, at least in my version of bash, doesn't actually

It's as if the COLUMNS varaible is smaller than the actual screen width. http://gatoisland.com/syntax-error/bash-while-loop-syntax-error.php I indented the code and made verbose the variable names just for readability. Thus, effectively, the if command's body will be executed if the backup drive exists. This is not merely a matter of idle curiosity--understanding that helps you comprehend this and other error messages in the future. Syntax Error In Expression Error Token Is

Now I know my ABCs, won't you come and golf with me? In summary: The original problem related to an unmatched ` in a backquote expression (and more generally, how to close a backquote expression and how newlines inside backquote expressions are handled Are you using a pipe somewhere during the assignment process? this contact form But you have to treat the variables as strings.

Activate Hearthstone season chest cards? Bash Let Page 1 of 2 1 2 > Search this Thread 08-14-2011, 12:35 PM #1 MTK358 LQ 5k Club Registered: Sep 2009 Posts: 6,443 Blog Entries: 3 Rep: bash Quick guess: separate problems causing errors, 1) variable COLUMNS is not set (or set to ":"), and 2) you should try removing the "$" from the first part of the "for"

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Will the medium be able to last 100 years? Search Forums Show Threads Show Posts Tag Search Advanced Search Unanswered Threads Find All Thanked Posts Go to Page... learn unix and linux commands operand expected (error token is INPUT1=/tmp/dir1 INPUT2=/tmp/dir2 INPUT3=/tmp/dir3 for s in INPUT{1..3}; do echo ${!s} done This works because: INPUT{1..3} expands to INPUT1 INPUT2 INPUT3. (It's equivalent to INPUT{1,2,3}.) Where $s is the expansion of s, Unary Operator Expected catkin Programming 6 03-18-2010 10:58 AM typeset arithmetic syntax error rosariop Linux - Newbie 7 10-13-2009 08:27 AM Bash arithmetic Blackout_08 Programming 2 06-08-2006 10:37 PM simple arithmetic in bash gfrair

Force Microsoft Word to NEVER auto-capitalize the name of my company Activate Hearthstone season chest cards? See below for details. Click here to see the post LQ members have rated as the most helpful post in this thread. navigate here Train ride from Copenhagen to Malmo Natural construction On THE other hand or on another hand?

up vote 4 down vote Use round parenthesis for numeric computations: num1=$((num1 + num2)) share|improve this answer edited Nov 24 '15 at 17:58 BoltClock♦ 381k939341043 answered Nov 24 '13 at 16:10 A single quote may not occur between single quotes, even when preceded by a backslash. Quote: Originally Posted by man bash Enclosing characters in single quotes preserves the literal value of each character within the quotes. Note As we will see, some of the commands used to facilitate math are a little picky about things like spaces around operators.

By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. I removed the "$" characters from in front of the variable names, and it doesn't show errors any more, but there is no ber on top.

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