All Questions
Tagged with printf text-processing
17 questions
0
votes
1
answer
101
views
When storing text on a USB drive, how do I make cat not hang?
Warning: I used these commands on a drive that had nothing on it (/dev/sdb). Do not attempt this on a drive with anything important on it.
I was experimenting some, and I discovered that the ...
- 545
5
votes
3
answers
2k
views
How to align the output generated in a shell "for" loop by columns
I'm trying to align output from a bash for loop.
Currently, I'm getting output from my loop that looks like so:
Directory: /some/long/directory/path Remote: some-remote
Directory: /some/dir/path ...
- 187
-1
votes
1
answer
4k
views
how to use echo or printf with xargs to iterate over a list from a file?
In poking about with xargs, as here:
nicholas@gondor:~/x$
nicholas@gondor:~/x$ xargs echo < list.txt
1 2 3
nicholas@gondor:~/x$
nicholas@gondor:~/x$ cat list.txt
1
2
3
nicholas@gondor:~/x$
how ...
0
votes
2
answers
256
views
delete numbers from a column consisting characters and numbers in bash
I have the following input file
H1
C1
C2
C3
H2
C4
.
.
.
I would like to obtain the following output format only with the characters and not the numbers
H
C
C
C
H
C
.
.
.
- 543
2
votes
1
answer
68
views
based on a line character, print corresponding number next to it
I have the following input format,
H
O
C
H
H
C
H
H
O
C
H
H
C
I would like to obtain the following output,
H1
O1
C1
H2
H3
C2
H4
H5
O2
C3
H6
H7
C4
- 543
0
votes
3
answers
1k
views
multiply specific column in a file which consists of thousands columns
The in file looks like this
-17.3644 0.00000000 0.00000000 ....
-17.2703 0.00000000 0.00000000 ....
-17.1761 0.00000000 0.00000000 ....
-16.5173 0.00000000 0....
- 543
2
votes
3
answers
1k
views
How to reverse input order?
The following code provides a backwards output when inputted as first to last, so input is required to be in reverse. How can this be flipped/reversed?
EDITED on 2019-05-23_07:52:04
(printf 'g?%s?m0\...
- 533
0
votes
2
answers
628
views
How to modify this `printf` code to reverse it's action?
Code below can, for example ...
[anony@mous-pc ~]$ (printf 'g?%s?m0\n' 008 006 004 002 ; printf 'wq\n') | ed -s file.txt
... take all of numbers within ...
[anony@mous-pc ~]$ cat some.txt
005
003
...
- 533
2
votes
1
answer
141
views
Newline character produced by `echo`, is it always there when using no options, regardless of shell?
Although I have read Stephane's answer concentrated on basically all aspects of echo vs printf, I am unsure if it also answers my question, which stands:
The newline character produced by echo, is it ...
- 30.2k
-2
votes
1
answer
2k
views
Printf appending fails
I Tried to run the following similar commands in CentOS (12.x):
printf "\nhello" "$HOME"/.bashrc
printf "\nhello" ${HOME}/.bashrc
After execution I display the content of the .bashrc file and see ...
0
votes
1
answer
30
views
Remove all lines in single file NOT matching keywords aligned in first column [closed]
I need to extract a series of lines identified by a keyword in the first column and print them in the same linear order.
The file is divided into sections delimited by a line of hyphens or equal ...
3
votes
2
answers
7k
views
printf in shell script can't do \x%x
where ECHO-VAR produces \xFF\xFF\xFF\x00 ($fb_COLOR15) these work on the command line:
CP="`ECHO-VAR`" printf $CP | dd status=none bs=4 count=$(( ( 1360 * 100 ) + 100 )) > /dev/fb0
printf "`ECHO-...
- 334
1
vote
2
answers
913
views
print multiple words separated by space
I have a text file and the data inside has format like (name age country):
michael jordans 25 US
adam smith 30 UK
chris wood ABC 22 Aus
if I use command: cat text.txt | awk {'print $1'} --> it will ...
- 11
1
vote
2
answers
238
views
Get the output in a formatted way
In a for loop, I am using the command:
echo " Job_time is $i : Stopping the job "
Sample output:
Job_time is 6 : Stopping the job
Job_time is 6.50 : Stopping the job
Desired output:
Job_time is 6 ...
- 11
1
vote
2
answers
2k
views
format command output with variable and fixed space
How can I achieve this best maintaining the hierarchy on the left and aligning the size value on the right?
Also, at the same time I'd like to round the size to one or two digits.
I tried with printf ...
- 1,291