Tagged Questions
16
votes
7answers
20k views
Looping through files with spaces in the names?
I wrote the following script to diff the outputs of two directores with all the same files in them as such:
#!/bin/bash
for file in `find . -name "*.csv"`
do
echo "file = $file";
diff ...
2
votes
3answers
61 views
Scripting to domain allocation to server
I have two text files:
file #1: domain.txt
cocacola.com
airtel.com
pepsi.com
file #2: servers.txt
192.0.53.42 , 4 # 4 domains already allocated on server 192.0.53.42
192.53.1.2 , 1 # 1 ...
3
votes
1answer
41 views
How to edit files in-place while performing operation on the values matching the searched pattern?
Given a list files containing random text and many datetimes in ISO format in it (e.g "2012-07-02T10:47:24+02:00"), how can I find all these datetimes and add 2 hours to each one ?
Ideally a solution ...
0
votes
1answer
140 views
How can I find and filter a specific column in a .csv file? [duplicate]
I have .csv files with the following structure:
cat,dog,mouse,pig,bird,cow,...
21,34,54,566,78,1,...
23,10,12,569,56,4,...
32,20,13,123,56,3,...
34,30,44,322,66,2,...
I want to filter the column ...
3
votes
2answers
66 views
Comparing two columns with two columns
I have a file that I need to compare the values in two columns with another two columns. For examples:
Item A B C D
1 201 3101 3101 201
2 3101 201 202 3101
3 3101 201 ...
2
votes
5answers
427 views
How can I split a text file into multiple text files using Perl?
I have a file ABC_TabDelim.txt that contains the following:
00:00:00:00 00:00:05:00 01SC_001.jpg
00:00:14:29 00:00:19:29 01SC_002.jpg
00:01:07:20 00:01:12:20 01SC_003.jpg
00:00:00:00 00:00:03:25 ...
1
vote
1answer
122 views
How to match 2 large file and print the difference in shell script
I have 2 files.
File1 has 400k numerical records.
e.g:
1
2
3
4
5
6
.. and so on
File 2 also has 420k numerical records.
e.g:
1
2
3
4
6
.. and so on
Both these file are in unsorted manner. I want ...
2
votes
2answers
206 views
System calls, AWK, and Bringing in external inputs
awk '{ TEMPVAR="/usr/bin"; printf("%s", system("ls $TEMPVAR")); }' empty
In this example I'm trying to bring in the variable TEMPVAR into the system call. How would I do this?
What I'm aiming to ...
16
votes
1answer
501 views
How to implement a horizontal cat?
Standard cat concatenates files line by line (row by row, if you will). I find myself needing a horizontal cat command more and more often recently; i.e. a command that takes a list of files and ...
2
votes
2answers
219 views
How to traverse a file and extract words using their index?
The given file must not be stored in variable and then traversed due to memory size restrictions:
Example:
var=$(cat FILE)
for i in $var
do
echo $i
done
How do you traverse all strings in a file ...
2
votes
1answer
184 views
intersection of two files according to the first column
I have two files
in file A, there are sequence_numbers
in the other file B, there are many columns, and the first column is sequnce numbers,
I want to get a files with all the lines in the B with the ...
1
vote
1answer
101 views
Using join with two files fails on larger file sizes
I am having some issues with a script that is using join to join two files. Eaxmple input files contains lines like this:
Here are the input file and the output of the join command:
...
3
votes
3answers
181 views
How to make and apply (patch) one side diff?
I want to make a shell script that updates a config file.
The file present on the server has information, like various IP addresses.
The new file has more code, from new configs added to the system, ...
9
votes
6answers
598 views
Text Manipulation Across multiple lines
I Have a file that has text like this:
AAAA
BBBB
CCCC
DDDD
1234
5678
9012
3456
EEEE
7890
etc...
And i want to match up the Alphabetic lines with the Numeric lines so they are like this:
...
2
votes
3answers
269 views
dynamic display of a running process?
I am writing a script and acording to that when i run it certain info will be displayed on the output screen.
for example say the constant data displayed is:
my name is mukesh.
i am 27 years old
...
