Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Date/Time parts to variable as integer

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Date/Time parts to variable as integer
# 1  
Old 04-23-2017
Linux Date/Time parts to variable as integer
Hi Guys,
i guess there is a several ways to grub the strings from date and time
like THISMONTH='/bin/date +%m'
but the hard part is to add or sub that string to a variable

i tried to use let command

TWOMONTHSAGO=$THISMONTH

declare -i TWOMONTHSAGO

let TWOMONTHSAGO-=2


but there are errors , syntax is wrong or it try to add string to integer...

i tried TWOMONTHSAGO = TWOMONTHSAGO-2
i'm a programmer but i'm not familiar with the bash script

can anybody help?
# 2  
Old 04-23-2017
You're making it too hard.

The date command you have (assuming you have GNU coreutils and dateutils) will do some arithmetic for you

Start here: Time / Date Commands

Keep going! Be sure to read your info or man page for the date command.
Specifically the option:
Code:
   -d, --date=STRING
              display time described by STRING, not 'now'

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Converting time format as Integer to seconds

Hello, How can we convert date like format 20181004171050 in seconds ? I can able to convert till date but failing for HHMMSS. date -d "20181004" "+%s" output as 1538596800 . But when i add hhmmss it is failing date -d "20181004172000" "+%s" result Invalid date Kindly guide. Regards (16 Replies)
Discussion started by: sadique.manzar
16 Replies

2. Shell Programming and Scripting

Separate a hash variable into 2 parts in Perl

Dear Perl users/experts, Could somebody help me how to solve my problem, I have a hash variable that I want to convert into dot file (graphviz). I know how to convert it to dot file but I need some modification on the output of the hash variable before convert it to dot file. Eeach key of... (1 Reply)
Discussion started by: askari
1 Replies

3. Shell Programming and Scripting

Converting date +%j into integer

Dear community, i got a problem to get "date +%j" as the right value. Today is the 10th day of the year. #./script.sh 2 #!/bin/bash/ Var1=$(date +%j) Var2=$1 let result=$Var1+$Var2 echo $Var1 plus $Var2 equals $result The output of the script is: 010 plus 2 equals 10... (9 Replies)
Discussion started by: OskarHF
9 Replies

4. Shell Programming and Scripting

Incrementing parts of ten digits number by parts

I have number in file which contains date and serial number: 2013101000. The last two digits are serial number (00). So maximum of serial number is 100. After reaching 100 it becomes 00 with incrementing 10 which is day with max 31. after reaching 31 it becomes 00 and increments 10... (31 Replies)
Discussion started by: Natalie
31 Replies

5. UNIX for Dummies Questions & Answers

Parsing file, reading each line to variable, evaluating date/time stamp of each line

So, the beginning of my script will cat & grep a file with the output directed to a new file. The data I have in this file needs to be parsed, read and evaluated. Basically, I need to identify the latest date/time stamp and then calculate whether or not it is within 15 minutes of the current... (1 Reply)
Discussion started by: hynesward
1 Replies

6. Solaris

How to Use a Variable as Integer?

hello, i am writing a script that takes the UID from the PASSWD and then i want to increse the Number by one. for the Next user. i cannot get this to work that a variable is as interger example: set i = 0 set $i = $+1 it's in tcsh if it's mather (10 Replies)
Discussion started by: shatztal
10 Replies

7. Emergency UNIX and Linux Support

Merge Static and dynamic parts in variable declaration

Dear Unix experts Moved from "Shell Programming and Scripting " I want to define a variable which contains dynmic and static part, daynamic part is the first field. Sample of data dddd aaaa sssss 12345 ssss 2323 234234 4242 dddd 3223 34234 54353 ssss 24234 3434 42342 dddd rwrw 423423... (2 Replies)
Discussion started by: yahyaaa
2 Replies

8. Shell Programming and Scripting

Merge Static and dynamic parts in variable declaration

Dear Unix experts I want to define a variable which contains dynmic and static part, daynamic part is the first field. Sample of data dddd aaaa sssss 12345 ssss 2323 234234 4242 dddd 3223 34234 54353 ssss 24234 3434 42342 dddd rwrw 423423 werwer nawk 'BEGIN {FS=" "}{... (4 Replies)
Discussion started by: yahyaaa
4 Replies

9. UNIX for Advanced & Expert Users

Bash shell: Cutting pasting only parts of the name of a directory into a variable

I have a script in a directory and want to search the directory before like follows: i=0 for file in ../HN_* do echo $file ((i+=1)) echo $i done Currently I get following output: ../HN_2 1 ../HN_3 2 (2 Replies)
Discussion started by: ABE2202
2 Replies

10. UNIX for Dummies Questions & Answers

Subtracting an Integer from a Variable

Hello, I am in following situation.- COUNT=`ls -l | wc -l` echo $COUNT ---> 26 NO_OF_FILES=$COUNT-1 echo $NO_OF_FILES ---> 26-1 Here, I want the output to be 25. How could I do this. It seems simple, but I am not getting it. Please help me. (2 Replies)
Discussion started by: The Observer
2 Replies
Login or Register to Ask a Question