Replace x with the number of lines you wish to keep. This will keep lines from the top. If you wish to keep lines counting from the bottom, replace head with tail.
-Chuck
Hi,
I am trying to find a script command that will let me trim leading and trailing space from a string. I have coded a SQL Select and sending the output to a file. Later I am parsing the file and reading each field. The problem is that each field uses the same size as the DB2 type it was defined... (2 Replies)
Hi,
I want to trim +with leading zero's with amount fields.I know using awk for trimming leading zeros with +,but I want get the entire row itself.
cat file_name |awk -F " " '{printf "%14.4f%f\n",$4}'
ex:
10 xyz bc +00000234.4500
20 yzx foxic +002456.000
Expexted
10 xyz bc... (3 Replies)
Hi,
How can I remove the unwanted spaces in the line.
123456 789 ABC DEF. - I wanna remove the sapces in this line, I need the output 123456789ABCDEF.
Pls help me...... (3 Replies)
Hello,
Im trying write a bash sript to search a file and identify any file names that contain a space at the end of them.
I was trying to use the grep command but I can find how I would identify the character I'm looking for.
Any help would be grately appreciated. (2 Replies)
I have file like this
FileA:
abc , "helloworld" , america
def,asia, japan
ghi, africa, ipl
Output Needed:
abc,"helloworld",america
def,asia,japan
ghi,africa,ipl
I would like to implement using awk.
I want to trim each field for its leading and trailing spaces. (7 Replies)
I'm trying to parse an output log and I've managed to reduce the output to the lines I need. But I'm having trouble pulling out only the info I'm interested in. The output is 40+ lines and here is a sample
Installing AppFresh 0.8.5.pkg from ./InstallerFiles/CustomPKG/26 (26)
Installing... (2 Replies)
Hi I need to trim white spaces from strings in a file.
Input file is like this:
1_rrc_CatalogGroups.csv = 607
1_rrc_Sales_TopCatalogGroups.csv = 4
1_rrc_Sales_CatalogEntries_CatalogGroup_Rel.csv = 7
Need to trim space before and after = symbol.
This is my script:
#!/usr/bin/ksh
... (2 Replies)
Hi i have a log file
P12345_15728710:DEBUG:Begin
P12345_15728710:DEBUG:Being
P12345_15729310:DEBUG:GetAgen
P12345_15726510:DEBUG:end
i want to trim this file and i want like this
15728710
15728710
15729310
15726510
i tried sed ..but not working..
sed "s/.*P12345__ \(.*\)... (4 Replies)
My files look like this
I need to remove the sequence GGGAAA and anything before that
I also need to remove the sequence AGCCCTA and anything after that
So I will end up with something like this
The left side is done but I cannot get the right side correctly. I would like to use... (3 Replies)
Discussion started by: Xterra
3 Replies
LEARN ABOUT OPENDARWIN
tail
TAIL(1) BSD General Commands Manual TAIL(1)NAME
tail -- display the last part of a file
SYNOPSIS
tail [-F | -f | -r] [-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
starting 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.
-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.
DIAGNOSTICS
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 6, 1993 BSD