Hi Don, [[ tempdate != "" ]] will always be true since the string tempdate is never "".
Hi Aia, $tempdate will expand to an empty string inside the for loop the first time a filename matching transactions.cor.2015-0[56789]* is found that does not contain the string .chk..
$tempdate will expand to an empty string after the for loop completes if, and only if, no filenames matching transactions.cor.2015-0[56789]* were found that did not contain the string .chk., or no filenames matching transactions.cor.2015-0[56789]* were found.
There should also be a check to be sure that at least one file matched the pattern transactions.cor.2015-0[56789]* (or the bash option that causes a non-matching pattern to expand to an empty list should be specified). I normally use ksh instead of bash. With ksh, I would avoid this problem by changing:
to:
which will not execute the loop if there are no matches. I always forget the option that enables this feature in bash and have to look it up, but for recent versions of bash, it is:
With single square brackets, you need the <dollar-sign> and quotes:
because the shell is parsing operands to a built-in. But, double square brackets are part of the shell command language, not a built-in, so the <dollar-sign> and quotes are optional. All of the following produce the same results:
taking the then branch if $template expands to a non-empty string. But the following are equivalent to each other, but, unlike the above three commands, always take the then branch:
[...] But, double square brackets are part of the shell command language, not a built-in, so the <dollar-sign> and quotes are optional. All of the following produce the same results:
Hi Don,
First, thank you for taking the time.
I understand that the properties of the double [[ does not suffer of the same issues that the single [ or test. It does not do word splitting nor globing, therefore you do not need to double quote the left-hand side of it and you only quote the right side if you do not want a pattern match, instead of a string comparison.
However, if [[ template != "" ]] does not expand since it is a literal string. How can it be the same that $template with or without quotes?
Perhaps, I can demonstrate my question better with a test.
Could you tell me when this if [[ template != "" ]] became an arithmetic expression?
As far as I understand it it is a string conditional expression. Maybe that's what I am missing. But if this were the case, then I would have to still believe that:
I have 3 files. Each of those files have the same number of records, however certain records have different values. I would like to grep the field in ALL 3 files and display the output with only the differences in column wise and if possible line number
File1
Name = Joe
Age = 33... (3 Replies)
Hello Friends,
Can somebody assist an issue I am having? I have a separate file with a list of account ids
XXX200B02Y01
XXX200B03Y01
XXX200B05Y01
XXX200B07Y01
XXX200B08Y01
I call the file, and run an egrep against a directory and logfiles
AccountID=$(cat... (2 Replies)
Hi,
Very good wishes to all!
Please help to provide the shell script for generating the record counts in filed wise from the .csv file
My question:
Source file:
Field1 Field2 Field3
abc 12f sLm
1234 hjd 12d
Hyd 34
Chn
My target file should generate the .csv file with the... (14 Replies)
My unix version is IBM AIX Version 6.1
I tried google my requirement and found the below answer,
find . -newermt “2012-06-15 08:13" ! -newermt “2012-06-15 18:20"
But newer command is not working in AIX version 6.1 unix
I have given my requirement below:
Input:
atr files:
... (1 Reply)
Hi All,
I would have many files in the server with
xyz*.dat -- Static file name
Physical files:
xyz1.dat - 01PM
xyz2.dat - 02PM
xyz3.dat - 03PM
In present version we are using
for f in $file_name
do
fname=`ls $f | grep -v ^'\|'$ | sed s/' '/'\\ '/g`
....
sqlldr... (4 Replies)
Hi,
I search all forum, but I can not find solutions of my problem :(
I have multiple files (5000 files), inside there is this data :
FILE 1:
1195.921 -898.995 0.750312E-02-0.497526E-02 0.195382E-05 0.609417E-05
-2021.287 1305.479-0.819754E-02 0.107572E-01 0.313018E-05 0.885066E-05
... (15 Replies)
Hi guys,
I want to delete files from june 13 to june 30, using rm command can any one tell me the sintax to remove. I ahve hunderd of core files in my /var dir. so i want to clear last month core files. Thanks in Advance.:)) (2 Replies)
Hi all,
this is my first post, i need to write a script to zip the files with datewise below are the log files.
-rw------- 1 root sso 85316156 May 24 22:11 core_test_smservaz_104_104_1243217459_8896
-rw------- 1 root sso 90413304 May 25 22:12 core_test_smservaz_104_104_1243303895_20912... (4 Replies)
I want a shell script which extract data from a log file which contains date and time-wise data and i need the data for a perticular interval of time...what can i do??? (3 Replies)
I am new to shell programming. Can anyone help me out with anyone of these?
Display a count of the number of regular files, the number of symbolic links, the number of sub-directories, the number of block-special files, and the number of character-special files in the directory.
I don't... (4 Replies)