The effect of this command is to substitute commas at the start of a line (represented by ^,) with nothing, and to also substitute commas at the end of a line (represented by ,$) with nothing. So any commas at the start and end will be removed, with everything else being left untouched.
Note that it will only remove exactly what it matches - i.e. one single comma, so if there are multiple commas at the start or end of some lines in your file you'd need to tweak this. But if every line is of the exact same format, then this would do the job.
Hello Experts,
I have a file "tt.txt" which is like:
#a1=a2
b1=b2
#c1=c2
I need to remove the pound (#) sign from a particular line. In this case let us assume it's 3rd line : "#c1=c2"
I can do it through:
sed "s/#c1=c2/c1=c2/" tt.txtbut it is possible that I may not know the value... (6 Replies)
Hi...
i need a script to remove the space before and after the operator like( / ).
Ex :
Input file
apple / manago
mango / fresh apple / fresh
Desired output:
apple/manago
mango/fresh apple/fresh
Note: betwee the desired operator space should be removed, between words do not remove... (3 Replies)
Hello!
Please bare with me, I'm a total newbie to scripting. Here's the sudo code of what I'm trying to do:
Get file name
Does file exist?
If true
get length of file name
get network id (this will be the last 3 numbers of the file name)
loop x 2
If... (1 Reply)
I'd like to remove (do a pattern or precise replacement - this I can handle in SED using Regex )
---AFTER THE 1ST Occurrence ( i.e. on the 2nd occurrence - from the 2nd to fourth occurance ) of a specific string : type 1
-- After the 1st occurrence of 1 string1 till the 1st occurrence of... (4 Replies)
Hi All,
I have output like this below
ldprod/03
ldprod/02
ldprod/01
ldprod/00
ldnprod/
ldnprod/030
I want only remove all character including /
ldprod
ldprod
ldprod
ldprod
ldprod
ldnprod (8 Replies)
Below i am trying to remove "/" and "r" from the output, so i need output as:
hdiskpower3
hdisk0
hdisk1
#inq | grep 5773 | awk '{print $1}' | sed 's/dev//g' | awk -F"/" '{$1=$1}1'
.....................................................//rhdiskpower0
//rhdiskpower1
//rhdiskpower2... (3 Replies)
Hi
I need help on this ..!!
Input :
xx_abc_regA
xx_def_regB
xx_qwe_regC
Now i required the output as the below
abc
def
qwe
Need to remove last occurrence of character (_) and rest of the string in Unix (sed).
Thanks in Advance ..!!!
-Nallachand (3 Replies)
hello.
How to remove all characters in a line from first character ( a $ ) until and including the third occurrence of that character ( $ ).
Any help is welcome. (10 Replies)
I have a file which comes every day and the file data look's as below.
Vi abc.txt
a|b|c|d\n
a|g|h|j\n
Some times we receive the file with only a new line character in the file like
vi abc.txt
\n (8 Replies)
Discussion started by: rak Kundra
8 Replies
LEARN ABOUT SUNOS
cat
cat(1) User Commands cat(1)NAME
cat - concatenate and display files
SYNOPSIS
cat [-nbsuvet] [file...]
DESCRIPTION
The cat utility reads each file in sequence and writes it on the standard output. Thus:
example% cat file
prints file on your terminal, and:
example% cat file1 file2 >file3
concatenates file1 and file2, and writes the results in file3. If no input file is given, cat reads from the standard input file.
OPTIONS
The following options are supported:
-n Precede each line output with its line number.
-b Number the lines, as -n, but omit the line numbers from blank lines.
-u The output is not buffered. (The default is buffered output.)
-s cat is silent about non-existent files.
-v Non-printing characters (with the exception of tabs, new-lines and form-feeds) are printed visibly. ASCII control characters
(octal 000 - 037) are printed as ^n, where n is the corresponding ASCII character in the range octal 100 - 137 (@, A, B, C, . . .,
X, Y, Z, [, , ], ^, and _); the DEL character (octal 0177) is printed ^?. Other non-printable characters are printed as M-x,
where x is the ASCII character specified by the low-order seven bits.
When used with the -v option, the following options may be used:
-e A $ character will be printed at the end of each line (prior to the new-line).
-t Tabs will be printed as ^I's and formfeeds to be printed as ^L's.
The -e and -t options are ignored if the -v option is not specified.
OPERANDS
The following operand is supported:
file A path name of an input file. If no file is specified, the standard input is used. If file is `-', cat will read from the
standard input at that point in the sequence. cat will not close and reopen standard input when it is referenced in this
way, but will accept multiple occurrences of `-' as file.
USAGE
See largefile(5) for the description of the behavior of cat when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).
EXAMPLES
Example 1: Concatenating a file
The following command:
example% cat myfile
writes the contents of the file myfile to standard output.
Example 2: Concatenating two files into one
The following command:
example% cat doc1 doc2 > doc.all
concatenates the files doc1 and doc2 and writes the result to doc.all.
Example 3: Concatenating two arbitrary pieces of input with a single invocation
The command:
example% cat start - middle - end > file
when standard input is a terminal, gets two arbitrary pieces of input from the terminal with a single invocation of cat. Note, however,
that if standard input is a regular file, this would be equivalent to the command:
cat start - middle /dev/null end > file
because the entire contents of the file would be consumed by cat the first time `-' was used as a file operand and an end-of-file condition
would be detected immediately when `-' was referenced the second time.
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of cat: LANG, LC_ALL, LC_CTYPE, LC_MES-
SAGES, and NLSPATH.
EXIT STATUS
The following exit values are returned:
0 All input files were output successfully.
>0 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|CSI |enabled |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO touch(1), attributes(5), environ(5), largefile(5), standards(5)NOTES
Redirecting the output of cat onto one of the files being read will cause the loss of the data originally in the file being read. For exam-
ple,
example% cat filename1 filename2 >filename1
causes the original data in filename1 to be lost.
SunOS 5.10 1 Feb 1995 cat(1)