Reading line1 with line2 and line 2 with line 3 in unix
Hi,
I have a requirement where i have to read a file line by line and see if the string(fixed postion 10 to 15 in the file) in line 2 is greater than string in line 1.
I have used following code
The problem with the above code is line1 is compared with line 2 and line 3 is compared with line 4.
But my requirement is i want to compare line 1 with line 2 and line 2 with line 3 and so on
Can any u pls tell me :-
I want to read a particular line from a file, say line no. 10.
This can be done by using awk..but that method I think, is inefficient.
Is there any direct command for this?
Thanks (2 Replies)
hi...
i need to open a file and read it line by line, and capture that it in to some variable and manipulate...
i need to get a line in to a variable
please help :confused: (1 Reply)
Hi,
I am a beginner in shell scripting. I have written the following script, which is supposed to process the while loop for each line in the sid_home.txt file. But I'm getting the 'end of file' unexpected for the last line. The file sid_home.txt gets generated as expected, but the script... (6 Replies)
Hi
I am a complete newbie in unix. Learning the ropes. I have a task where I have to write a shell script to read a file line by line. I have tried some code from the net like.
The file data looks like this.
FIN427;2010003;2010003
FIN475;2010001;2010003
FIN476;2010001;2010003... (4 Replies)
So, I want to read line-by-line a text file with unknown number of files....
So:
a=1
b=1
while ; do
b=`sed -n '$ap' test`
a=`expr $a + 1`
$here do something with b etc
done
the problem is that sed does not seem to recognise the $a, even when trying
sed -n ' $a p'
So, I cannot read... (3 Replies)
I need some help. I would like to read in a text file.
Take a variable such as ROW-D-01, compare it to what's in one line in the text file such as PROD/VM/ROW-D-01 and only input PROD/VM into a variable without the /ROW-D-01.
Is this possible? any help is appreciated. (2 Replies)
Hi,
I want to read a live log file line by line and considering those line which start from time stamp;
Below code I am using, which read line but throws an exception when comparing line that does not contain error code
tail -F /logs/COMMON-ERROR.log | while read myline; do... (2 Replies)
Hi there,
I am trying to read the content such that if there is 'adsmsext.dll', it will read everything from line one until it reads line 6 with 'C:' then it will terminate at line 5.
1. C:\WINDOWS\system32\adsmsext.dll NT AUTHORITY\Authenticated Users:R
2. ... (5 Replies)
Hello,
Currently, I am reading few queries from the below .sql file
--SOURCE TABLE NAME
--SOURCE QUERY
SEL COL1, COL2, COL3, COL4,
COL5, COL6, COL7 WHERE COL5 = '2015-11-04 16:24:00.000000' FROM SOURCE TABLE;
--TARGET TABLE NAME
--TARGET QUERY
SEL COLUMN1, COLUMN2, COLUMN3, COLUMN4,... (4 Replies)
Discussion started by: ronitreddy
4 Replies
LEARN ABOUT ULTRIX
cut
cut(1) General Commands Manual cut(1)Name
cut - cut out selected fields of each line of a file
Syntax
cut -clist [file1 file2...]
cut -flist [-dchar] [-s] [file1 file2...]
Description
Use the command to cut out columns from a table or fields from each line of a file. The fields as specified by list can be fixed length,
that is, character positions as on a punched card (-c option), or the length can vary from line to line and be marked with a field delim-
iter character like tab (-f option). The command can be used as a filter. If no files are given, the standard input is used.
Use to make horizontal ``cuts'' (by context) through a file, or to put files together in columns. To reorder columns in a table, use and
Options
list Specifies ranges that must be a comma-separated list of integer field numbers in increasing order. With optional - indicates
ranges as in the -o option of nroff/troff for page ranges; for example, 1,4,7; 1-3,8; -5,10 (short for 1-5,10); or 3- (short
for third through last field).
-clist Specifies character positions to be cut out. For example, -c1-72 would pass the first 72 characters of each line.
-flist Specifies the fields to be cut out. For example, -f1,7 copies the first and seventh field only. Lines with no field delim-
iters are passed through intact (useful for table subheadings), unless -s is specified.
-dchar Uses the specified character as the field delimiter. Default is tab. Space or other characters with special meaning to the
shell must be quoted. The -d option is used only in combination with the -f option, according to XPG3 and SVID2/SVID3.
-s Suppresses lines with no delimiter characters. Unless specified, lines with no delimiters are passed through untouched.
Either the -c or -f option must be specified.
Examples
Mapping of user IDs to names:
cut -d: -f1,5 /etc/passwd
To set name to the current login name for the csh shell:
set name=`who am i | cut -f1 -d" "`
To set name to the current login name for the sh, sh5, and ksh shells:
name=`who am i | cut -f1 -d" "`
Diagnostics
"line too long" A line can have no more than 511 characters or fields.
"bad list for c/f option"
Missing -c or -f option or incorrectly specified list. No error occurs if a line has fewer fields than the list calls
for.
"no fields" The list is empty.
See Alsogrep(1), paste(1)cut(1)