Jim, do you mean file caching helped sed because of the sequence of execution I chose? If yes, I tried the other way and still sed took less time to complete this particular task.
Code:
# time sed '1d' infile > out
real 0m3.41s
user 0m1.22s
sys 0m1.62s
Code:
# time awk 'FNR>1' infile > out
real 0m5.60s
user 0m2.20s
sys 0m3.21s
Last edited by Yoda; 11-12-2012 at 09:38 PM..
Reason: Code Added
Hi
I am running a script (which compares two directory contents) for which I am getting an output of 70 pages in which few pages are blank so I was able to delete those blank lines.
But I also want to delete the headers present for each page. can any one help me by providing the code... (1 Reply)
I have a file with millions of records...Before I experiment, I would like to know which one is faster.
Both the commands work absolutely fine on a smaller set of records.
Please advice.
sed 's/^M//g' ${INPUT_FILE} > tmp.txt
mv tmp.txt ${INPUT_FILE}
tr -d "\15" < ${INPUT_FILE} > ... (11 Replies)
I have a data file with over 500,000 records/lines that has the header throughout the file.
SEQ_ID Name Start_Date Ins_date Add1 Add2
1 Harris 04/02/08 03/02/08 333 Main Suite 101
2 Smith 02/03/08 01/23/08 287 Jenkins
SEQ_ID Name ... (3 Replies)
Hello,
So i want to send mails in any way from a solaris 5.8 system, perhaps using mailx or sendmail. My purpose is to stay clear of systems name in head data. So i want to strip at least the "Message-Id" and the "Recieved" headers of the mail. Yet this seems to be a bit of a problem.
Now i... (2 Replies)
Hi,
I'm trying to strip all lines between two headers in a file:
### BEGIN ###
Text to remove, contains all kinds of characters
...
Antispyware-Downloadserver.com (Germany)=http://www.antispyware-downloadserver.c
om/updates/
Antispyware-Downloadserver.com #2... (3 Replies)
Hi ,
I have a typical situation. I have 4 files and with different headers (number of headers is varible ).
I need to make such a merged file which will have headers combined from all files (comman coluns should appear once only).
For example -
File 1
H1|H2|H3|H4
11|12|13|14
21|22|23|23... (1 Reply)
Hi All,
I have some 80,000 files in a directory which I need to rename. Below is the command which I am currently running and it seems, it is taking fore ever to run this command. This command seems too slow. Is there any way to speed up the command. I have have GNU Parallel installed on my... (6 Replies)
Hi,
I have catenated multiple output files (from a monte carlo run) into one big output file. Each individual file has it's own two line header. So when I catenate, there are multiple two line headers (of the same wording) within the big file. How do I use the sed command to search for the... (1 Reply)
Good evening
I need your help please, im new at Unix and i wanted to remove the first 5 headers for 100000 records files and then create a control file .ctl that contains the number of records and all seem to work out but when i tested at production it didnt wotk.
Here is the code:
#!... (6 Replies)
I have a file called "dsout" with empty rows and duplicate headers.
DATE TIME TOTAL_GB USED_GB %USED
--------- -------- ---------- ---------- ----------
03/05/013 12:34 PM 3151.24316 2331.56653 73.988785 ... (3 Replies)
Discussion started by: Daniel Gate
3 Replies
LEARN ABOUT FREEBSD
atf-sh
ATF-SH(1) BSD General Commands Manual ATF-SH(1)NAME
atf-sh [-s shell] -- interpreter for shell-based test programs
SYNOPSIS
atf-sh script
DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library.
atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter-
preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not
use any non-standard extensions.
The following options are available:
-s shell Specifies the shell to use instead of the value provided by ATF_SHELL.
ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes.
ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes.
ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a
specific interpreter.
EXAMPLES
Scripts using atf-sh(3) should start with:
#! /usr/bin/env atf-sh
Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode
the path to atf-sh in the script and then use the -s option afterwards as a single parameter:
#! /path/to/bin/atf-sh -s/bin/bash
ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts.
SEE ALSO atf-sh(3)BSD September 27, 2014 BSD