I have two questions. First, I was wondering how to use sed to remove two header lines or two tail lines. Here I just do the same operation twice...I'm sure there is a better way. Second, and more importantly, is there a better way to have these operations use files other than having it output these dumb ZZ* files and then rm them? There must be a more elegant way...
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 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)
Hi All,
Following is the part of my script.It does contain many for loops and is not elegant. Please feel free to suggest any changes to make this elegant.
Thanks!
nua7
for i in `ls $CATALINA_HOME/shared/lib/*.jar`;
do
LOCALCLASSPATH="$LOCALCLASSPATH:$i"
done
for i in... (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)
Heya there,
A small selection of my data is shown below.
DATE TIME FRAC_DAYS_SINCE_JAN1
2011-06-25 08:03:20.000 175.33564815
2011-06-25 08:03:25.000 175.33570602
2011-06-25 ... (4 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
Im new at unix shell scripting and im planning to script a shell that removes headers for about 120 files in a directory and each file contains about 200000
lines in average.
i know i will loop files to process each one and ive found in this great forum different solutions... (5 Replies)
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 OSX
tail
TAIL(1) BSD General Commands Manual TAIL(1)NAME
tail -- display the last part of a file
SYNOPSIS
tail [-F | -f | -r] [-q] [-b number | -c number | -n number] [file ...]
DESCRIPTION
The tail utility displays the contents of file or, by default, its standard input, to the standard output.
The display begins at a byte, line or 512-byte block location in the input. Numbers having a leading plus ('+') sign are relative to the
beginning of the input, for example, ``-c +2'' starts the display at the second byte of the input. Numbers having a leading minus ('-') sign
or no explicit sign are relative to the end of the input, for example, ``-n 2'' displays the last two lines of the input. The default start-
ing location is ``-n 10'', or the last 10 lines of the input.
The options are as follows:
-b number
The location is number 512-byte blocks.
-c number
The location is number bytes.
-f The -f option causes tail to not stop when end of file is reached, but rather to wait for additional data to be appended to the
input. The -f option is ignored if the standard input is a pipe, but not if it is a FIFO.
-F The -F option implies the -f option, but tail will also check to see if the file being followed has been renamed or rotated. The
file is closed and reopened when tail detects that the filename being read from has a new inode number. The -F option is ignored if
reading from standard input rather than a file.
-n number
The location is number lines.
-q Suppresses printing of headers when multiple files are being examined.
-r The -r option causes the input to be displayed in reverse order, by line. Additionally, this option changes the meaning of the -b,
-c and -n options. When the -r option is specified, these options specify the number of bytes, lines or 512-byte blocks to display,
instead of the bytes, lines or blocks from the beginning or end of the input from which to begin the display. The default for the -r
option is to display all of the input.
If more than a single file is specified, each file is preceded by a header consisting of the string ``==> XXX <=='' where XXX is the name of
the file unless -q flag is specified.
EXIT STATUS
The tail utility exits 0 on success, and >0 if an error occurs.
SEE ALSO cat(1), head(1), sed(1)STANDARDS
The tail utility is expected to be a superset of the IEEE Std 1003.2-1992 (``POSIX.2'') specification. In particular, the -F, -b and -r
options are extensions to that standard.
The historic command line syntax of tail is supported by this implementation. The only difference between this implementation and historic
versions of tail, once the command line syntax translation has been done, is that the -b, -c and -n options modify the -r option, i.e., ``-r
-c 4'' displays the last 4 characters of the last line of the input, while the historic tail (using the historic syntax ``-4cr'') would
ignore the -c option and display the last 4 lines of the input.
HISTORY
A tail command appeared in PWB UNIX.
BSD June 29, 2006 BSD