[SOLVED] sed problem

qrange · 03-07-2015, 11:30 PM

I'm trying this:

more file.log | sed -n -e '/`date +"%b %Oe"`/,$p'

but it doesn't work. can someone help me? thanks.

dijetlo · 03-08-2015, 12:10 AM

sed -n -e '/`date +" file.log

more isn't outputting anything for sed to chew on.

allend · 03-08-2015, 12:17 AM

Check your sed expression. I think you have the capital letter O, when you really want the numeral zero.

qrange · 03-08-2015, 12:29 AM

@dijetlo
more is working, file is there.

@allend
I need single digit day. its the same problem with or without O.

dijetlo · 03-08-2015, 01:16 AM

Sorry
I'm not a sed expert, so I took a loot at your date formatting.

however if I had to guess(again)
that

Quote:

+" b Oe"

should be this

Quote:

"+%b %Oe"

since the date interprets '+' as the switch and therefor a string,

(is it just me or is everyone getting their "%"s stripped out of their posts...)

allend · 03-08-2015, 01:55 AM

I am not sure what formatting you want, so some quick tests.

Code:

bash-4.3$ date +%b%e
Mar 8
bash-4.3$ date +%b%0e
Mar08
bash-4.3$ date +%b%-e
Mar8
bash-4.3$ date +"%b %e"
Mar  8
bash-4.3$ date +"%b %0e"
Mar 08
bash-4.3$ date +"%b %-e"
Mar 8

From 'man date'

Quote:

By default, date pads numeric fields with zeroes. The following optional flags may follow '%':
- (hyphen) do not pad the field
_ (underscore) pad with spaces
0 (zero) pad with zeros

qrange · 03-08-2015, 01:57 AM

thats all fine, date works as expected, but sed doesn't. I even tried assigning variable and using:

more file.log | sed -n -e '/`$var1`/,$p'

but that fails too.

allend · 03-08-2015, 03:05 AM

Please post a sample from the log that you are trying to interrogate, obfuscating any sensitive information.
Also, please read djetlo's comment in post #2.

qrange · 03-08-2015, 03:26 AM

moving the + didn't solve anything. If I copy/paste the output of date command into sed it works nice.
for some reason backticks fail in sed?

syg00 · 03-08-2015, 03:43 AM

try

Code:

sed -n -e "/$var1/,$ p" file.log

more is unneeded, and note carefully the changes.

qrange · 03-08-2015, 03:48 AM

thanks, that does work. I used more, because piping is needed.
edit: it works with `date...` too, now.