Sponsored Content
Top Forums UNIX for Beginners Questions & Answers Format a date on additional column awk Post 303031787 by Don Cragun on Tuesday 5th of March 2019 09:56:00 PM
Old 03-05-2019
The date utility, the awk utility, and the bash utility on macOS don't behave as the current GNU utility extensions that are referenced elsewhere in this thread, but if you're willing to use ksh instead of bash, you could try:
Code:
#!/bin/ksh
while IFS=, read -r date rest
do	printf '%s,%s,%(%a)T\n' "$date" "$rest" "$date"
done < HB.txt

which, with your sample input file, produces the output:
Code:
05/20/1997,1130,5.93,5.96,5.93,5.96,49200,Tue
05/20/1997,1131,5.96,5.96,5.9,5.93,252400,Tue
05/14/1997,1132,5.93,5.99,5.93,5.99,89600,Wed
05/15/1997,1133,5.93,5.93,5.71,5.74,203200,Thu

which seems to be what you want except that this will produce 3 character abbreviations for all days of the week instead of producing "Tues" for Tuesdays as you seem to want. Is this close enough?

This was tested on macOS Mojave version 10.14.3 instead of on macOS High Sierra, but I don't think ksh has changed significantly between these two releases.
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

AWK CSV to TXT format, TXT file not in a correct column format

HI guys, I have created a script to read 1 column in a csv file and then place it in text file. However, when i checked out the text file, it is not in a column format... Example: CSV file contains name,age aa,11 bb,22 cc,33 After using awk to get first column TXT file... (1 Reply)
Discussion started by: mdap
1 Replies

2. UNIX for Dummies Questions & Answers

Format Date in awk

I have an assignment in a Linux class I am taking. It has multiple scripts. Basicly when it runs it asks the user name and shows information about the user from the /etc/passwd and /etc/shadow files. The one I need help with is the one that reads the /etc/shadow file. I need to format the date into... (1 Reply)
Discussion started by: kazulk
1 Replies

3. Shell Programming and Scripting

Convert the date format from mdy to ymd in column of file

The date format in the delimited file for one column '6/27/2011 12:00:00 AM' Is it possible o change it to '2011-06-27 12:00:00 AM' for all the records.. Thanks in advance..... (8 Replies)
Discussion started by: infernalhell
8 Replies

4. Shell Programming and Scripting

awk compare column with date format

I have this code to compare columns 1 and 10 between file1 and file 2 and give me all records that match column 1 but dont match column 10 However column 10 is date format mm/dd/yy and awk cant read it and compare ...i tried awk < file1 -F~ '{print $10}' and it gave blank screen Is... (1 Reply)
Discussion started by: sigh2010
1 Replies

5. Shell Programming and Scripting

awk - change date format

I have below date format in a CSV file. (dd/mm/yyyy) Ex Input: 9/8/2013 Need to convert it into below format (yyyymmdd ) and redirect to new file. Ex Output: 20130809 How do I use awk here to change the format and if leading 0 (zero) is not then add it. Please help. Thanks. (8 Replies)
Discussion started by: vegasluxor
8 Replies

6. Shell Programming and Scripting

awk convert date format

Could you tell me how to convert the following dates? If I have m/d/yyyy, I want to have 0m/0d/yyyy. I want my dates to always be 8 digits. In other words, I want a 0 inserted whenever the month or day is a single digit. My issue is first I need to use FS="," to get field $4 for the... (7 Replies)
Discussion started by: wbrunc
7 Replies

7. Shell Programming and Scripting

Convert date column as yyyy/mm/dd format

Hi All, I have file like “April 10, 2013”,”raj” “April 29, 2013”,”raj1” Output : “2013/04/10”,”raj” “2013/04/29”,”raj1” Please help me how to do... (9 Replies)
Discussion started by: bmk
9 Replies

8. Shell Programming and Scripting

How to change the format of the date column in a flat file?

Hi, i have a flat file namely temp.txt with this data below ID|name|contact_date 101|Kay|2013-12-26 102|let|2013-12-26 I need to modify the date data in the flat file into MM/DD/YYYY HH24:MI:SS format let me know the code for this. Thank you! (5 Replies)
Discussion started by: srikanth_sagi
5 Replies

9. Shell Programming and Scripting

How to awk or grep the last column in file when date on column contains spaces?

Hi have a large spreadsheet which has 4 columns APM00111803814 server_2 96085 Corp IT Desktop and Apps APM00111803814 server_2 96085 Corp IT Desktop and Apps APM00111803814 server_2 96034 Storage Mgmt Team APM00111803814 server_2 96152 GWP... (6 Replies)
Discussion started by: kieranfoley
6 Replies
env(1)								   User Commands							    env(1)

NAME
env - set environment for command invocation SYNOPSIS
/usr/bin/env [-i | -] [name=value]... [utility [arg... ]] /usr/xpg4/bin/env [-i | -] [name=value]... [utility [arg... ]] DESCRIPTION
The env utility obtains the current environment, modifies it according to its arguments, then invokes the utility named by the utility op- erand with the modified environment. Optional arguments are passed to utility. If no utility operand is specified, the resulting environment is written to the standard output, with one name=value pair per line. /usr/bin If env executes commands with arguments, it uses the default shell /usr/bin/sh (see sh(1)). /usr/xpg4/bin If env executes commands with arguments, it uses /usr/xpg4/bin/sh (see ksh(1)). OPTIONS
The following options are supported: -i | - Ignores the environment that would otherwise be inherited from the current shell. Restricts the environment for utility to that specified by the arguments. OPERANDS
The following operands are supported: name=value Arguments of the form name=value modify the execution environment, and are placed into the inherited environment before utility is invoked. utility The name of the utility to be invoked. If utility names any of the special shell built-in utilities, the results are unde- fined. arg A string to pass as an argument for the invoked utility. EXAMPLES
Example 1 Invoking utilities with new PATH values The following utility: example% env -i PATH=/mybin mygrep xyz myfile invokes the utility mygrep with a new PATH value as the only entry in its environment. In this case, PATH is used to locate mygrep, which then must reside in /mybin. ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of env: LANG, LC_ALL, LC_CTYPE, LC_MES- SAGES, and NLSPATH. PATH Determine the location of the utility. If PATH is specified as a name=value operand to env, the value given shall be used in the search for utility. EXIT STATUS
If utility is invoked, the exit status of env is the exit status of utility. Otherwise, the env utility returns one of the following exit values: 0 Successful completion. 1-125 An error occurred. 126 utility was found but could not be invoked. 127 utility could not be found. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: /usr/bin +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |enabled | +-----------------------------+-----------------------------+ /usr/xpg4/bin +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWxcu4 | +-----------------------------+-----------------------------+ |CSI |enabled | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
ksh(1), sh(1), exec(2), profile(4), attributes(5), environ(5), standards(5) SunOS 5.11 2 Jan 2002 env(1)
All times are GMT -4. The time now is 06:10 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy