Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

error with then in if else?

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting error with then in if else?
# 1  
Old 09-28-2010
error with then in if else?
Hi i am just trying to compare the first line of a file with a string.
Code:
col=one,two,three
if["head -1 testFile.csv" == "$col"]
then
  echo "equal"
else
  echo "NE"
fi

i am getting error 'then' is not expected

can someone help?
Last edited by Franklin52; 09-28-2010 at 10:28 AM.. Reason: Please use code tags and indent your code
# 2  
Old 09-28-2010
spaces. You need spaces
Code:
if [  (your test goes here)      ] 
then

else


fi

spaces on all sides of the brackets
# 3  
Old 09-28-2010
thanks for the response

so it works without error but it is not interupting correctly
Code:
col=one,to,three
if [ "head -1 testFile.csv" == "$col" ]
then
echo "equal"
else
echo "not equal"
fi

if testFile.csv contains
one,to,three
apple
orange

it outputs
not equal...
Last edited by vbe; 09-28-2010 at 12:57 PM.. Reason: code tags please
# 4  
Old 09-28-2010
"head -1 testFile.csv" isn't taken as a command, instead it tries to match this with $col since it is within quotes.

replace quotes with ` [the character which comes when tilde key is pressed ] and things will work fine...

Cheers
# 5  
Old 09-28-2010
got it so for values in unix to be interpolated then need the ` charactor.

so `head -1 testFile.csv` == `$col`

translates the head command to its output and the $col to "one,to,three"

thanks i will try it Smilie
# 6  
Old 09-28-2010
Its more like:
Code:
if [  "$(head -1 testFile.csv)" == "$col"  ]

And by the way:
Quote:
Forums rules extract:
Additional helpful guidelines for all posters (for better, faster replies to questions):

(B) Use "[code]" tags when you post any code or data samples so others can easily read your code. You can easily do this by highlighting your code and then clicking on the # in the editing menu.
See the rules on how to do it by typing by hand
# 7  
Old 09-28-2010
Just nitpicking here, but POSIX specifies a single = :
Code:
if [ "$(head -1 testFile.csv)" = "$col" ]
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Print Error in Console and both Error & Output in Log file - UNIX

I am writing a shell script with 2 run time arguments. During the execution if i got any error, then it needs to redirected to a error file and in console. Also both error and output to be redirected to a log file. But i am facing the below error. #! /bin/sh errExit () { errMsg=`cat... (1 Reply)
Discussion started by: sarathy_a35
1 Replies

2. Solaris

Rpcinfo: can't contact portmapper: RPC: Authentication error; why = Failed (unspecified error)

I have two servers with a fresh install of Solaris 11, and having problems when doing rpcinfo between them. There is no firewall involved, so everything should theoretically be getting through. Does anyone have any ideas? I did a lot of Google searches, and haven't found a working solution yet. ... (2 Replies)
Discussion started by: christr
2 Replies

3. Shell Programming and Scripting

What is this error log = hda: irq timeout: error=0x00 and how to solve?

what is this error log = hda: irq timeout: error=0x00 and how to solve? every day upon checking the logs i see this error. hda: irq timeout: error=0x00 hda: irq timeout: error=0x00 hda: irq timeout: error=0x00 hda: irq timeout: error=0x00 hw_client: segfault at 0000000000000046 rip... (3 Replies)
Discussion started by: avtalan
3 Replies

4. UNIX for Dummies Questions & Answers

> 5 ")syntax error: operand expected (error token is " error

im kinda new to shell scripting so i need some help i try to run this script and get the error code > 5 ")syntax error: operand expected (error token is " the code for the script is #!/bin/sh # # script to see if the given value is correct # # Define errors ER_AF=86 # Var is... (4 Replies)
Discussion started by: metal005
4 Replies

5. UNIX for Advanced & Expert Users

ssh error: Error reading response length from authentication socket

Hi - I am getting the error `Error reading response length from authentication socket' when I ssh from my cluster to another cluster, and then back to my cluster. It doesn't seem to affect anything, but it's just annoying that it always pops up and tends to confuse new users of the cluster. I... (1 Reply)
Discussion started by: cpp6f
1 Replies

6. Solaris

fssnap error :snapshot error: File system could not be write locked

Hi Guys. This is part of my filesystem structure : Filesystem size used avail capacity Mounted on /dev/md/dsk/d0 47G 5.2G 42G 12% / /devices 0K 0K 0K 0% /devices ctfs 0K 0K 0K 0% ... (2 Replies)
Discussion started by: aggadtech08
2 Replies

7. AIX

nim mksysb error :/usr/bin/savevg[33]: 1016,07: syntax error

-------------------------------------------------------------------------------- Hello, help me please. I am trying to create a mksysb bakup using nim. I am geting this error, how to correct it ? : Command : failed stdout: yes stderr: no... (9 Replies)
Discussion started by: astjen
9 Replies

8. UNIX for Advanced & Expert Users

VSI-FAX error - Cannot login to server and Connecto error to host

I encounters a VSIFAX related error: vfxstat: Cannot login to server on rsac3: Connect error to host 172.16.1.45: Invalid argument It started happening last night with a core dump. Then we can't start VSIFAX again. I am runing VSI-FAX 4.2 on AIX box (0 Replies)
Discussion started by: b_jin
0 Replies

9. UNIX for Dummies Questions & Answers

awk Shell Script error : "Syntax Error : `Split' unexpected

hi there i write one awk script file in shell programing the code is related to dd/mm/yy to month, day year format but i get an error please can anybody help me out in this problem ?????? i give my code here including error awk ` # date-month -- convert mm/dd/yy to month day,... (2 Replies)
Discussion started by: Herry
2 Replies

10. UNIX for Dummies Questions & Answers

Error: Internal system error: Unable to initialize standard output file

Hey guys, need some help. Running AIX Version 5.2 and one of our cron jobs is writing errors to a log file. Any ideas on the following error message. Error: Internal system error: Unable to initialize standard output file I'm guessing more info might be needed, so let me know. Thanks (2 Replies)
Discussion started by: firkus
2 Replies
Login or Register to Ask a Question