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# 15  
Old 01-03-2008
Pls explain me this code - using sort command
Quote:
Originally Posted by Raynon
Hi ,

I would like to list or sort by date and time (the files are named in day and time format) where the latest file will be placed at the bottom and the earliest file be placed at the top. Can anybody help me?

My files are named in the following manner.

EG: abc_071128_144121_data
" abc " is random , " 071128 " depicts the date in yymmdd format, " 144121 " depicts the time in the hhmmss format

Input:
abc_071128_144121_data
xxx_071128_123524_data
fff_071128_122837_data
jjj_071129_010544_data
qqq_071129_002603_data
hhh_071128_120728_data
bbb_071128_113329_data

Ouput:
bbb_071128_113329_data
hhh_071128_120728_data
fff_071128_122837_data
xxx_071128_123524_data
abc_071128_144121_data
qqq_071129_002603_data
jjj_071129_010544_data
Hi Raynon,
I have seen your query posted for sort date and time.

Can you pls explain me what does it mean?

ls -1 |sort -t'_' -k2,2 -k3,3

Pls tell me which field or column it is taking and sort. I was trying with many inputs but i didnt get the correct answer.

Thanks
Yamini
# 16  
Old 01-03-2008
Question
Quote:
Originally Posted by Raynon
Hi rikxik,

It still doesn't work. Can you help ?

$ ls -l
total 0
-rw-r--r-- 1 raynon real 4 Jan 2 17:06 abc_071128_144121_data
-rw-r--r-- 1 raynon real 4 Jan 2 17:06 bbb_071128_113329_data
-rw-r--r-- 1 raynon real 6 Jan 2 17:06 zzz_071128_163017_data_interim

$ ls -1 |sort -t'_' -k2,2 -k3,3
sort: option requires an argument -- k
sort [-bcdfiMmnru] [-o output] [-T directory] [-ykmem] [-t char]
[+pos1 [-pos2]] [-k field_start[type][,field_end[type]] [file...]

$ ls -1 |sort -t"_" -k2,2 -k3,3
sort: option requires an argument -- k
sort [-bcdfiMmnru] [-o output] [-T directory] [-ykmem] [-t char]
[+pos1 [-pos2]] [-k field_start[type][,field_end[type]] [file...]
Quite strange - the command I posted is in accordance with the syntax your sort is throwing out.

Ok - first do this and see if you get filename listing (I can't believe I have to do this!):
Code:
$ ls -1
abc_071128_144121_data
bbb_071128_113329_data
fff_071128_122837_data
hhh_071128_120728_data
jjj_071129_010544_data
qqq_071129_002603_data
xxx_071128_123524_data

Once the above is verified, try this:

Code:
ls -1 |sort -t'_' +1 +2

@Yamini
sort -t'_' -k2,2 -k3,3 means first sort on starting field 2 and ending field 2 i.e. effectively on field 2. Then similarly on field 3.

HTH
# 17  
Old 01-03-2008
rikxik and Raynon,

Please post the results of "which sort" and, Raynon, please also post the results of "uname -a" as rikxik did. This might help you guys get on the same page.
# 18  
Old 01-03-2008
Yeah Smilie

Code:
$ uname -a
SunOS db012a 5.8 Generic_117350-35 sun4us sparc FJSV,GPUZC-M
$ which sort
/usr/bin/sort

This is the usage sort mentions:

Code:
usage: sort [-cmu] [-o output] [-T directory] [-S mem] [-z recsz]
        [-dfiMnr] [-b] [-t char] [-k keydef] [+pos1 [-pos2]] files...

# 19  
Old 01-03-2008
I think that alternate sort programs may be in /usr/xpg and/or /usr/ucb but I don't have a Solaris box real handy to check.
# 20  
Old 01-03-2008
Works for xpg4 version too:

Code:
$ ls -1 |/usr/xpg4/bin/sort -t'_' -k1 -k2
abc_071128_144121_data
bbb_071128_113329_data
fff_071128_122837_data
hhh_071128_120728_data
jjj_071129_010544_data
qqq_071129_002603_data
xxx_071128_123524_data

# 21  
Old 01-04-2008
Hi rikxik/Perderabo,

I tried the below as you have requested. Don't really know what they means but do you get any ideas from here ? I tried the " /usr/xpg4/bin/sort " and it doesn;t work too.


$ uname -a
SunOS mytester 5.7 Generic_106541-40 sun4u sparc SUNW,Ultra-1

$ which sort
/bin/sort

$ ls -1 |/usr/xpg4/bin/sort -t'_' -k1 -k2
sort: option requires an argument -- k
sort [-bcdfiMmnru] [-o output] [-T directory] [-ykmem] [-t char]
[+pos1 [-pos2]] [-k field_start[type][,field_end[type]] [file...]

$ ls -1 |/usr/xpg4/bin/sort -t"_" -k1 -k2
sort: option requires an argument -- k
sort [-bcdfiMmnru] [-o output] [-T directory] [-ykmem] [-t char]
[+pos1 [-pos2]] [-k field_start[type][,field_end[type]] [file...]
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