I'm monitoring a WLAN network to keep track of new SSIDs popping up. The SSIDs are stored along with the AP MAC address and a few other parameters in a CSV file. A typical line could look like this:
Now, the problem is that some networks use SSIDs with blank spaces. Then it looks like this:
Some SSIDs come with no displayed SSID at all (hidden). The post-processing of these files of course become a bit cumbersome as some of the lines have three columns, some four and some more (depending on how many words the SSID is built up from).
Does someone know a smart way of detecting the SSID string and remove the blank spaces? Each line ends with the channel number (2437 above) and I could of course re-order the position of the columns so that the SSID is placed in the last column.
As the result, I would for example want "My Wi-Fi Network" to be converted to "My_Wi-Fi_Network". Like this:
All...
I want to remove blank spaces in file . I just leraned that we can use
" cat <Input filename> | tr -s ‘ ‘ > <Target file name> "
i also know with SED we can replace a blank space by other character by
sed s/ /*/g filename.
Please let me know how can i do that by... (1 Reply)
Guys, I need some help... how can I remove the blank spaces between the lines below? (between the date and the hour fields)
21/05/07 00:05:00 99
21/05/07 00:10:01 99
21/05/07 00:15:00 99
21/05/07 00:20:00 99
21/05/07 00:25:00 99
I want to make the file... (4 Replies)
hello
how to remove blank spaces of a file with awk??
i´m trying
awk '{gsub(" ","",$0); print $0;}' filename.txt
but it answers
syntax error near line
first of all i did this for download from netbackup database jobs
privilege bpdbjobs -report -M sv88 -gdm -header |cut -c-1024... (4 Replies)
Hi,
I have this problem that there are blank spaces in my text file... i want to remove them
line 1
line 2
line 3
I want to remove the space between line 2 and line 3... I tried sed... it work but it prints the whole text file at the command prompt which i dont want....
sde i tried was... (4 Replies)
Hello All,
I am trying to remove all tabspaces and all blankspaces from my file using sed & awk, but not getting proper code. Please help me out.
My file is like this (<b> means one blank space, <t> means one tab space)-
$ cat file
NARESH<b><b><b>KUMAR<t><t>PRADHAN... (3 Replies)
I have a file which has blank spaces($) and the blank spaces at the end of the file are not coming up while cutting the files.. please find the following file, desired output..
file1:
001_AHaris$$$$$020$$$$$$$$$
001_ATony$$$$$$030$$$$$$$$$
002_AChris$$$$$090$$$$$$$$$... (5 Replies)
hi
i have a file which store some data.the contents of my file is
data1:data2
data3:data4
i have a script which read this file
correct="$(cat /root/sh | cut -d: -f1)"
i used this syntax..please help me which syntax is used to remove blank spaces..then how to read this file.. (1 Reply)
Hello..
I have a text file. I want to remove all the blank spaces(except tab) from the file..
I tried using sed command as shown below
sed 's/ //g' file1
But the problem with the above command is that it also eliminates 'tab' which is between the columns..
For example if the contents... (7 Replies)
I have a file which contains data such as that shown below. How do i remove all the blcnak spaces, before, during and at the end of each line in one command?
300015, 58.0823212, 230.424728
300016, 58.2276459, 229.141602
300017, 58.7590027, 226.960846
... (9 Replies)
Hi Gurus,
Somebody can say me how to delete blank spaces and blank lines in a file unix, please.
Thank you for advanced. (10 Replies)
Discussion started by: systemoper
10 Replies
LEARN ABOUT REDHAT
csv
csv(n) CSV processing csv(n)
NAME
csv - Procedures to handle CSV data.
SYNOPSIS
package require Tcl 8.3
package require csv ?0.3?
::csv::join values {sepChar ,}
::csv::joinlist values {sepChar ,}
::csv::read2matrix chan m {sepChar ,} {expand none}
::csv::read2queue chan q {sepChar ,}
::csv::report cmd matrix ?chan?
::csv::split line {sepChar ,}
::csv::split2matrix m line {sepChar ,} {expand none}
::csv::split2queue q line {sepChar ,}
::csv::writematrix m chan {sepChar ,}
::csv::writequeue q chan {sepChar ,}
DESCRIPTION
The csv package provides commands to manipulate information in CSV FORMAT (CSV = Comma Separated Values).
COMMANDS
The following commands are available:
::csv::join values {sepChar ,}
Takes a list of values and returns a string in CSV format containing these values. The separator character can be defined by the
caller, but this is optional. The default is ",".
::csv::joinlist values {sepChar ,}
Takes a list of lists of values and returns a string in CSV format containing these values. The separator character can be defined
by the caller, but this is optional. The default is ",". Each element of the outer list is considered a record, these are separated
by newlines in the result. The elements of each record are formatted as usual (via ::csv::join).
::csv::read2matrix chan m {sepChar ,} {expand none}
A wrapper around ::csv::split2matrix (see below) reading CSV-formatted lines from the specified channel (until EOF) and adding them
to the given matrix. For an explanation of the expand argument see ::csv::split2matrix.
::csv::read2queue chan q {sepChar ,}
A wrapper around ::csv::split2queue (see below) reading CSV-formatted lines from the specified channel (until EOF) and adding them
to the given queue.
::csv::report cmd matrix ?chan?
A report command which can be used by the matrix methods format 2string and format 2chan. For the latter this command delegates the
work to ::csv::writematrix. cmd is expected to be either printmatrix or printmatrix2channel. The channel argument, chan, has to be
present for the latter and must not be present for the first.
::csv::split line {sepChar ,}
converts a line in CSV format into a list of the values contained in the line. The character used to separate the values from each
other can be defined by the caller, via sepChar, but this is optional. The default is ",".
::csv::split2matrix m line {sepChar ,} {expand none}
The same as ::csv::split, but appends the resulting list as a new row to the matrix m, using the method add row. The expansion mode
specified via expand determines how the command handles a matrix with less columns than contained in line. The allowed modes are:
none This is the default mode. In this mode it is the responsibility of the caller to ensure that the matrix has enough columns to
contain the full line. If there are not enough columns the list of values is silently truncated at the end to fit.
empty In this mode the command expands an empty matrix to hold all columns of the specified line, but goes no further. The overall
effect is that the first of a series of lines determines the number of columns in the matrix and all following lines are
truncated to that size, as if mode none was set.
auto In this mode the command expands the matrix as needed to hold all columns contained in line. The overall effect is that after
adding a series of lines the matrix will have enough columns to hold all columns of the longest line encountered so far.
::csv::split2queue q line {sepChar ,}
The same as ::csv::split, but appending the resulting list as a single item to the queue q, using the method put.
::csv::writematrix m chan {sepChar ,}
A wrapper around ::csv::join taking all rows in the matrix m and writing them CSV formatted into the channel chan.
::csv::writequeue q chan {sepChar ,}
A wrapper around ::csv::join taking all items in the queue q (assumes that they are lists) and writing them CSV formatted into the
channel chan.
FORMAT
Each record of a csv file (comma-separated values, as exported e.g. by Excel) is a set of ASCII values separated by ",". For other lan-
guages it may be ";" however, although this is not important for this case (The functions provided here allow any separator character).
If a value contains itself the separator ",", then it (the value) is put between "".
If a value contains ", it is replaced by "".
EXAMPLE
The record
123,"123,521.2","Mary says ""Hello, I am Mary"""
is parsed as follows:
a) 123
b) 123,521.2
c) Mary says "Hello, I am Mary"
SEE ALSO
matrix, queue
KEYWORDS
csv, matrix, queue, package, tcllib
csv 0.3 csv(n)