I use the command to get next day relative to specified date as follows:
date -d "20130107 1days" "+%Y%m%d"
but , if the input is 2013010712 , I want to get 2013010711 , how can i do ?
Or, If there is a simple method to do it?
My date isn't new enough to handle the 2013010712 format but, with some helper punctuation added for my date (GNU coreutils 8.13), the method for changing hours is shown:
$ date -d "2013-01-07 12 -1hour" "+%Y%m%d%H"
2013010711
$ date -d "2013-01-07 12 +1hour" "+%Y%m%d%H"
2013010713
Related
I have a log file abc.log in which each line is a date in date +%m%d%y format:
061019:12
062219:34
062319:56
062719:78
I want to see the all the logs between this date range (7 days before date to current date) i.e (from 062019 to 062719 in this case). The result should be:
062219:34
062319:56
062719:78
I have tried few things from my side to achieve:
awk '/062019/,/062719' abc.log
This gives me correct answer, but if i don't want to hard-code the date value and try achieving the same it does not give the correct value.
awk '/date --date "7 days ago" +%m%d%y/,/date +%m%d%y' abc.log
Note:
date --date "7 days ago" +%m%d%y → 062019 (7 days back date)
date +%m%d%y → 062719 (Current date)
Any suggestions how this can be achieved?
Your middle-endian date format is unfortunate for sorting and comparison purposes. Y-m-d would have been much easier.
Your approach using , ranges in awk requires exactly one log entry per day (and that the log entries are sorted chronologically).
I would use perl, e.g. something like:
perl -MPOSIX=strftime -ne '
BEGIN { ($start, $end) = map strftime("%y%m%d", localtime $_), time - 60 * 60 * 24 * 7, time }
print if /^(\d\d)(\d\d)(\d\d):/ && "$3$1$2" ge $start && "$3$1$2" le $end' abc.log
Use strftime "%y%m%d" to get the ends of the date range in big-endian format (which allows for lexicographical comparisons).
Use a regex to extract day/month/year from each line into separate variables.
Compare the rearranged date fields of the current line to the ends of the range to determine whether to print the line.
To get around the issue of looking for dates that may not be there, you could generate a pattern that matches any of the dates (since there are only 8 of them it doesn’t get too big, if you want to look for the last year it might not work as well):
for d in 7 6 5 4 3 2 1 0
do
pattern="${pattern:+${pattern}\\|}$(date --date "${d} days ago" +%m%d%y)"
done
grep "^\\(${pattern}\\)" abc.log
I want to convert date and month as integers.
for example.
if the current date as per the command "Date +%m-%d-%y" output, is this
09-11-17
Then I am storing
cur_day=`date +%d`
cur_month=`date +%m`
the $cur_day will give me 11 and $cur_month will give me 09.
I want to do some operations on the month as 09. like i want to print all the numbers up to 09.
like this 01,02,03,04,05,06,07,08,09
Same way I want to display all the numbers up to cur_day
like 01,02,03,04,05,06,07,08,09,10,11
Please tell me how can i do it.
Thanks in Advance.
For months:
$ printf ',%02d' $(seq 1 $(date +%m)) | sed 's/,/like this /; s/$/\n/'
like this 01,02,03,04,05,06,07,08,09
For days:
$ printf ',%02d' $(seq 1 $(date +%d)) | sed 's/,/like /; s/$/\n/'
like 01,02,03,04,05,06,07,08,09,10,11
printf will print according to a format. In this case, the format ,%02d formats the numbers with commas and leading zeros.
The sed command puts the string you want at the beginning of the line and adds a newline at the end.
I need to convert this date format to epoch : 03/Apr/2016 14:22:59
the command
date -d "03/Apr/2016 14:22:59" +"%s"
will return :
date: invalid date ‘03/Apr/2016 14:22:59
Anyone can help me format it in a way it become recognizable by date -d ?
Thanks in advance.
Perl to the rescue:
perl -MTime::Piece -e 'print Time::Piece
->strptime("03/Apr/2016 14:22:59", "%d/%b/%Y %H:%M:%S")
->epoch'
Info page for date input formats can be shown with following command:
info date "Date input formats"
Unfortunately your date format is not supported by date. You can however convert your string into format that is supported for example like this:
date -d "$(echo '03/Apr/2016 14:22:59' | tr -s "/" "-")" +"%s"
To provide information about which kind of input strings can be used for date command I will write here a short summary:
Show date from epoch
date -d "#1513936964"
Words like today, tomorrow, month names (January), AM/PM, time zone names are supported
date -d "tomorrow 10:00:30PM"
date -d "03 April 2016 14:22:59"
Calendar formats
date -d "04/03/2016 14:22:59"
date -d "03-Apr-2016 14:22:59"
date -d "2016-04-03 14:22:59.00"
Timezones
date -d "PDT now"
Which day was Christmas last year?
date -d "$(date -d "2017-12-24") -1 year" +"%A"
Using Python:
python -c 'from time import strftime, strptime;print strftime("%s", strptime("03/Apr/2016 14:22:59", "%d/%b/%Y %H:%M:%S"))'
I have 2 script in bash, and i have some files:
transaction-2012-01-01.csv.bz2
transaction-2012-01-02.csv.bz2
transaction-2012-01-03.csv.bz2
transaction-2012-01-04.csv.bz2
.
.
transaction-2012-01-31.csv.bz2
transaction-2012-02-01.csv.bz2
.
.
transaction-2012-02-28.csv.bz2
I have a script called script.sh
cat script.sh
YEAR_MONTH=$1
FILEPATH="transaction-$YEAR_MONTH*.csv.bz2"
bzcat $FILEPATH|strings|grep -v "code" >> output
And if you need call the script you can use other script
cat script2.sh
LAST_MONTH=$(date -d -1month +%Y"-"%m)
if [ $# -eq 1 ]; then
DATE=$1
else
DATE=$LAST_MONTH
fi
script.sh $DATE 1>output$DATE.csv 2>> log.txt
And it do cat the files in a month, but now i need call the script with a specific week in a year:
bash script2.sh 2012-01
where 2012 is the year and 01 is the month
Now i need call the script with:
bash script2.sh 2012 13
where 2012 is the year and 13 is the week in a year
Now i need the cat only to the files in the year and week that the user specified, no per month per week
But the format of the files do not help me!!!! because the name is transaction-year-month-day.csv.bz2, not transaction-year-week.csv.bz2
Take a look at the manpage for strftime. These are date format codes. For example:
$ date +"%A, %B %e, %Y at %I:%m:%S %p"
Will print out a date like:
Thursday, May 30, 2013 at 02:05:31 PM
Try to see why this works.
On some systems, the date command will have a -j switch. This means, don't set the date, but reformat the given date. This allows you to convert one date to another:
$ date -f"$input_format" "$string_date" +"$output_format"
The $input_format is the format of your input date. $string_date is the string representation of the date in your $input_format. And, $output_format is the format you want your date in.
The first two fields are easy. Your date is in YY-MM-DD format:
$ date -f"%Y-%m-%d" "$my_date_string"
The question is what can you do for the final format. Fortunately, there is a format for the week in the year. %V which represents the weeks at 01-53 and %W which represents the weeks as 00-53.
What you need to do is find the date string on your file name, then convert that to the year and week number. If that's the same as the input, you need to concatenate this file.
find $dir -type f | while read transaction_file
do
file_date=${transaction_file#transaction-} #Removes the prefix
file_date=${file_date%.csv.bz2} #Removes the suffix
weekdate=$(date -j -f"%Y-%m-%d" "$file_date" +"%Y %W")
[ "$weekdate" -eq "$desired_date" ] || continue
...
done
For example, someone puts in 2013 05 as the desired date, you will go through all of your files and find ones with dates in the range you want. NOTE: That the week of the year is zero filled. You may need to zero fill the input of the week number to match.
I have a string in the format "yyyymmdd". It is a string in bash and I want to get it converted into a date so that all other date functions can be used on it.
"20121212" string into "20121212" date with format "%Y%m%d".
This worked for me :
date -d '20121212 7 days'
date -d '12-DEC-2012 7 days'
date -d '2012-12-12 7 days'
date -d '2012-12-12 4:10:10PM 7 days'
date -d '2012-12-12 16:10:55 7 days'
then you can format output adding parameter '+%Y%m%d'
We can use date -d option
1) Change format to "%Y-%m-%d" format i.e 20121212 to 2012-12-12
date -d '20121212' +'%Y-%m-%d'
2)Get next or last day from a given date=20121212. Like get a date 7 days in past with specific format
date -d '20121212 -7 days' +'%Y-%m-%d'
3) If we are getting date in some variable say dat
dat2=$(date -d "$dat -1 days" +'%Y%m%d')
date only work with GNU date (usually comes with Linux)
for OS X, two choices:
change command (verified)
#!/bin/sh
#DATE=20090801204150
#date -jf "%Y%m%d%H%M%S" $DATE "+date \"%A,%_d %B %Y %H:%M:%S\""
date "Saturday, 1 August 2009 20:41:50"
http://www.unix.com/shell-programming-and-scripting/116310-date-conversion.html
Download the GNU Utilities from Coreutils - GNU core utilities (not verified yet)
http://www.unix.com/emergency-unix-and-linux-support/199565-convert-string-date-add-1-a.html
just use the -d option of the date command, e.g.
date -d '20121212' +'%Y %m'