Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

How to increment date using "for loop" in format MMDDYY inside the shell script?

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting How to increment date using "for loop" in format MMDDYY inside the shell script?
# 1  
Old 01-29-2013
How to increment date using "for loop" in format MMDDYY inside the shell script?
Code:
Need to increment the date from "currentdate + 90days" inside the for loop (i=1 to i=50)

# 2  
Old 01-29-2013
What have you tried so far?
# 3  
Old 01-29-2013
Code:
for i in {1..10}
do
   date +"%d/%m/%y" --date="-$i days ago"
done

but getting the error
Code:
date: 0551-402 Invalid character in date/time specification.
Usage: date [-u] [+"Field Descriptors"]

# 4  
Old 01-29-2013
Verify that you have GNU date:
Code:
date --version
date (GNU coreutils) 5.97

If yes, then try:
Code:
for i in {1..10}
do
   date  --date="-${i} days ago" +"%d/%m/%y"
done

# 5  
Old 01-29-2013
We are using AIX version not GNU. Provide the solution for AIX for date increment where --date is not supported.
# 6  
Old 01-29-2013
If you have AIX you don't have a lot of options for date math. This snippet continues to come in handy:
Code:
for ((I=0; I<=50; I++))
do
        DATE=$(perl -e 'use POSIX qw(strftime);  print strftime "%Y/%m/%d\n", localtime(time()+($ARGV[0]*60*60*24));' -- -${I})
        echo "got date $DATE"
done

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Bash script - Print an ascii file using specific font "Latin Modern Mono 12" "regular" "9"

Hello. System : opensuse leap 42.3 I have a bash script that build a text file. I would like the last command doing : print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt where : print_cmd ::= some printing... (1 Reply)
Discussion started by: jcdole
1 Replies

2. Shell Programming and Scripting

Failure: if grep "$Var" "$line" inside while read line loop

Hi everybody, I am new at Unix/Bourne shell scripting and with my youngest experiences, I will not become very old with it :o My code: #!/bin/sh set -e set -u export IFS= optl="Optl" LOCSTORCLI="/opt/lsi/storcli/storcli" ($LOCSTORCLI /c0 /vall show | grep RAID | cut -d " "... (5 Replies)
Discussion started by: Subsonic66
5 Replies

3. Shell Programming and Scripting

Bash - How to do a "read -p" inside a while loop?

Hi there guys! I was trying to do: while read line; do if ; then read -p "Press Enter to continue..." cont=0 fi echo $line let cont++ done < file.txt However, I have read that the read -p would not work in a while loop... I was wondering if there is any other way to... (2 Replies)
Discussion started by: rplae
2 Replies

4. Shell Programming and Scripting

While loop breaking when using "ssh" command inside

Hi , I am trying to read a list of hosts from a config file and trying to get file list from that host. For this I have used one while loop. cat "$ARCHIVE_CFG_FILE" | sed '/^$/d' | sed '/^#/d' | while read ARCHIVE_CFG do SOURCE_SERVER_NAME=`echo "$ARCHIVE_CFG" | awk -F '|' '{ print... (2 Replies)
Discussion started by: Anupam_Halder
2 Replies

5. Shell Programming and Scripting

How to use 'expect' to pass UID & Password to a "for loop" in shell script?

Friends, Need someone's help in helping me with the below requirement for a script: > For a list of servers(over 100+), I need to login into each of them(cannot configure password-less ssh) & grab few configuration details < I know, this is possible through expect programming in a simple... (14 Replies)
Discussion started by: thisissouvik
14 Replies

6. AIX

How to use 'expect' to pass UID & Password to a "for loop" in shell script?

Friends, Need someone's help in helping me with the below requirement for a script: > For a list of servers(over 100+), I need to login into each of them(cannot configure password-less ssh) & grab few configuration details < I know, this is possible through expect programming in a simple... (2 Replies)
Discussion started by: thisissouvik
2 Replies

7. Shell Programming and Scripting

Format output from the file to extract "date" section

Hello Team , I have to extract date section from the below file output. The output of the file is as shown below. I have to extract the "" this section from the above output of the file. can anyone please let me know how can we acheive this? (4 Replies)
Discussion started by: coolguyamy
4 Replies

8. Shell Programming and Scripting

How to increment a user defined date value in the DATE format itself using shell script?

I need to increment a date value through shell script. Input value consist of start date and end date in DATE format of unix. For eg. I need increment a date value of 1/1/09 to 31/12/09 i.e for a whole yr. The output must look like 1/1/09 2/2/09 . . . 31/1/09 . . 1/2/09 . 28/2/09... (1 Reply)
Discussion started by: sunil087
1 Replies

9. Shell Programming and Scripting

convert mmddyy date format to ccyyddd format??

hi, for reading a cobol indexed file i need to convert "mmddyy" date format to "ccyyddd" format. i checked the datecalc and other scripts but couldnt modify them to cater to my need:(... The datecalc gives an output which i believe is the total days till that date, but i want to convert it... (2 Replies)
Discussion started by: Bhups
2 Replies

10. Shell Programming and Scripting

Date increment in the format "YYYYMMDD"

Hi all, I want to increment the date which is in the format "YYYYMMDD". ex: If the date is 20010601 Increment should be: 20010602, 20010603 etc., Any help will be much appreciated. Many Thanks and Regards, Ganapati (4 Replies)
Discussion started by: ganapati
4 Replies
Login or Register to Ask a Question