Tagged Questions
5
votes
5answers
192 views
How to remove multiple blank lines from a file?
I have some text-files I use to take notes in - just plain text, usually just using cat >> file. Occasionally I use a blank line or two (just return - the new-line character) to specify a new ...
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 ...
11
votes
1answer
1k views
Making a progressbar with “dialog” from rsync output
I'm looking for a way to filter/redirect rsync output in a manner where it can be fed to the "dialog --gauge" command, so I can get a nice looking progressbar during file sync.
Currently I have only ...
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 ...
2
votes
2answers
206 views
System calls, AWK, and Bringing in external inputs
awk '{ TEMPVAR="/usr/bin"; printf("%s", system("ls $TEMPVAR")); }' empty
In this example I'm trying to bring in the variable TEMPVAR into the system call. How would I do this?
What I'm aiming to ...
3
votes
1answer
153 views
Split file based on a pattern with leading zeros
I have a book in text format. I would like to split the book into several files where each file contains a single chapter. Therefore I'm using the following command:
awk '/Chapter/{i++}{print > ...
1
vote
2answers
98 views
How to parse fields out of a text file and write them to another file
I have executed a database command and have generated an output file of the results.
Each field name starts with dbt_xxxxxx
Each field value is the value after the equal sign.
how can I parse the file ...
3
votes
1answer
322 views
merging files and getting column values based on id field
bash-3.2$ cat sample.log sample.log.1 sample.log.2
ID COL1 COL2 COL4
1 col1 col2 col4
2 c1 c2 c4
3 co1 co2 co4
ID COL3 COL1
1 col3 col1
2 c3 c1
3 co3 co1
ID COL1 COL2 COL3
1 col1 ...
1
vote
2answers
205 views
$2 (field reference) in awk BEGIN is not working
In the following snippet, $2 in awk is returning empty. What am I doing wrong? I am trying to find the difference between MAX and MIN.
#!/bin/ksh
if [ $# -ne 1 ]; then
echo "Usage: sh ...
4
votes
1answer
215 views
Efficient way of comparing in awk
#!/bin/awk
BEGIN {
while(getline var < compareTo > 0)
{
orderIds[var]=var;
}
}
{
if(orderIds[$0] == "")
{
print $0;
...
1
vote
3answers
382 views
To list out duplicate filenames in a listing?
bash-3.00$ cat f.txt
-rw-r--r-- 1 mukesh other 102 Nov 5 18:32 f1.txt
-rw-r--r-- 1 mukesh other 19 Nov 5 18:32 f2.txt
-rw-r--r-- 1 mukesh other 204 Nov 5 18:32 ...
3
votes
1answer
140 views
Help improving my AWK skills
This program works as I intended but I feel like I used some clumsy methods to get the out put I desired(especially with my use of print commands and variable declarations)
Could some one improve ...