Checking and replacing first line in text file, one-liner?
Hello,
I'm looking to check only the first line of a file to see if it is a format string, like
if the first line is anything else, insert the above string.
I'd appreciate a one liner as I'm putting this command inside of a
so far I'm hacking awk that looks like
which correctly detects if the format string is there or not but can't seem to figure out how to get awk to redirect the pipe to insert the format string?
I must remove hex characters 0A and 0D from several fields within an MS Access Table. Since I don't think it can be done in Access, I am trying here.
I am exporting a Table from Access (must be fixed length fields, I think, for my idea to work here) into a text format.
I then want to run a... (2 Replies)
Hello,
I have the following report (report.txt) file (see attached).
I would like to check the file and if the field is error, then showing error message at output.
1. In the report, 1st, 2st and 3nd line can be ignore to check
2. start to check line 4 (each field use "," to split
- 1st... (1 Reply)
Hi
I need a perl onliner to delete a line in a file starting with few words.
Example
file.txt
----------
my name is don
I live in London
I am woking as engineer
I want to delete a line starting with 'I live in' using perl oneliner and in place edit with out temporary files
Thanks... (2 Replies)
can someone help me translate the following command, from:
/usr/bin/awk "/^$TOFDAYM $TOFDAYD /,0" $LOGFILE
to something like
perl -e .....
basically, i want to use perl to do awk functions within a shell script. i want to do the above awk, using perl.
any suggestions? (9 Replies)
I have file like this
"copy table_name from filea.txt on node replace delimiter '|';"
"copy table_name from fileb.txt on node replace delimiter '|';"
"copy table_name from filec.txt on node replace delimiter'|';"
"copy table_name from filee.txt on node replace delimiter '|';"
"copy... (1 Reply)
Hi
I need to write a Perl script that the file given as first argument of the command line that will find all occurrences of the string given as the third argument of the command line and replace with the string given as the fourth argument. Name newfound file is specified as the second... (3 Replies)
Is it possible to replace a line of text within a file while it's closed with a single command or a script? Please show me an example or point me to a webpage that shows an example. The file has this line of text:
LoginGraceTime 100
I want to replace it with the following:
... (2 Replies)
Hi,
I've got this output:
# cat test2.txt
TM1ITP1-TMNLSTP1 SLC00=0,SLC01=0,SLC02=0,SLC03=0
if I just use cat test2.txt | tr "," "\n" I'll end up very near to what I'm trying to achieve:
TM1ITP1-TMNLSTP1 SLC00=0
SLC01=0
SLC02=0
SLC03=0
But how can i eventually add the term... (1 Reply)
Hi
I want to replace time stamp in the following line
PROCNAME.Merge.exchMon.CODE.T_QSTART 08:45 read
assuming the new time stamp is 09:45 ; the line is getting replaced as below
:45 read
I'm trying to use the perl one liner in bash script
perl -pi... (4 Replies)
Discussion started by: charlie87
4 Replies
LEARN ABOUT HPUX
fspec
fspec(4) Kernel Interfaces Manual fspec(4)NAME
fspec - format specification in text files
DESCRIPTION
It is sometimes convenient to maintain text files on the HP-UX system with non-standard tabs, (meaning tabs that are not set at every
eighth column). Generally, such files must be converted to a standard format - frequently by replacing all tabs with the appropriate num-
ber of spaces - before they can be processed by HP-UX system commands. A format specification occurring in the first line of a text file
specifies how tabs are to be expanded in the remainder of the file.
A format specification consists of a sequence of parameters separated by blanks and surrounded by the brackets and Each parameter consists
of a keyletter, possibly followed immediately by a value. The following parameters are recognized:
The parameter specifies tab settings for the file. The value of tabs must be one of the following:
1. A list of column numbers separated by commas, indicating tabs set at the specified columns;
2. A followed immediately by an integer n, indicating tabs at intervals of n columns;
3. A followed by the name of a ``canned'' tab specification.
Standard tabs are specified by or equivalently, etc. Recognized canned tabs are defined by the command (see
tabs(1)).
The parameter specifies a maximum line size. The value of size must be an integer. Size checking is performed after
tabs have been expanded, but before the margin is inserted at the beginning of the line.
The parameter specifies a number of spaces to be inserted at the beginning of each line. The value of margin must be an
integer.
The parameter takes no value. Its presence indicates that the line containing the format specification is to be deleted
from the converted file.
The parameter takes no value. Its presence indicates that the current format is to prevail only until another format
specification is encountered in the file.
Default values (assumed for parameters not supplied) are and If the parameter is not specified, no size checking is performed. If the
first line of a file does not contain a format specification, the above defaults are assumed for the entire file. The following is an
example of a line containing a format specification:
If a format specification can be disguised as a comment, it is not necessary to code the parameter.
Several HP-UX system commands correctly interpret the format specification for a file. Among them is which can be used to convert files to
a standard format acceptable to other HP-UX system commands.
SEE ALSO ed(1), newform(1), tabs(1).
fspec(4)