All Questions
Tagged with text-processingshell
383 questions
1vote
2answers
87views
Filter for arbitrary AND patterns [duplicate]
Consider a command which takes arguments like this: cmd foo bar baz [arbitrary args...]. How do you build a filter of AND patterns based on those arguments? Something like this pipeline of greps: grep ...
- 3,422
8votes
5answers
1kviews
Run command on each line of CSV file, using fields in different places of the command
I have a CSV file and want to run a command for each line, using the fields of the file as separate arguments. For example given the following file: foo,42,red bar,13,blue baz,27,green I want to run ...
- 272
0votes
2answers
92views
Run program only on matching lines
Let's say I have a program blackbox, and a file with the following contents: in this file this line contains =TAG= so does =TAG= this one as =TAG= does this other line this line does ...
- 672
0votes
3answers
102views
Splitting Words into space separated characters [duplicate]
I have a table with one word in each row. I want to split the word into space separated c h a r a c t e r s. Is there a way to do that via bash command? If yes, I also have a table with multiple words ...
0votes
2answers
280views
From hexdump to ascii (xxd -r stuck writing zero bytes)
To diagnose secure boot issues, I'm looking at the sbat sections of all bootloaders on a machine: sudo sh -c 'for f in /boot/efi/EFI/*/*.efi; do echo "$f"; objdump -j .sbat -s "$f" ...
- 6,729
0votes
5answers
126views
How can I replace the last occurrence of " before ] (text-manipulation)
I'm doing some text manipulation and I want to replace the last occurrence of " (with ", "four") before ] which could be in different lines. (this essentially adds a new item in ...
- 33
-2votes
1answer
182views
Error in command su
I am creating a command that will change a certain line in the /etc/profile file from a script, however in certain versions of Linux the sudo command may not be activated so it would be necessary to ...
user569757
3votes
5answers
478views
How to create a new column and add a random identifier to it with miller
I want to add a column with a randomly created "case number" to my csv file. The first 2 letters of the casenumber must be any letter from A-Z in capitals. followed by 5 random numbers. ...
- 357
25votes
3answers
5kviews
Is it now safe to parse the output of GNU ls?
The accepted wisdom for the past few decades has been that it is never a good idea to parse the output of ls ([1],[2]). For example, if I want to save a file's modification date along with its name ...
- 250k
0votes
1answer
310views
Auto-translation of newline characters in the terminal
I'm following along here. I notice (this is not complete, just for demonstration) that at this point: #include <termios.h> raw.c_iflag &= ~(ICRNL | IXON); raw.c_oflag &= ~(OPOST); ...
6votes
2answers
1kviews
Why xargs does not process the last argument?
Observe: mark@L-R910LPKW:~$ echo a b | xargs -d' ' -I{} bash -c 'echo {} 1' a 1 b bash: line 2: 1: command not found mark@L-R910LPKW:~$ What is going on?
- 379
-2votes
1answer
59views
Split/extract street name from street number [duplicate]
I have some addresses.csv in this formats Street 1 Street 10 Street 100 Street 1000 Straße 1b Straße1b Street 1 B Street, 1B The Street 1B The-Street 1B The'Street 1B The&Street 1B The Str. 1B ...
- 167
2votes
2answers
122views
Create new file per line from txt file, avoid file name too long
I'm creating new file for every line of text in a .txt file file=/tmp/textFile.txt while IFS= read -r line do printf "%s\n" "$line" > /tmp/"$line"txt done < ...
0votes
0answers
28views
Find and replace text using sed using variable [duplicate]
I have a specific text: ==4 to be replaced by ==5. So, I initialized two variables with $i and $j with 4 and 5 respectively and used this sed command to do the work: sed -i 's/==${i}/==${j}/g' "...
- 26
0votes
3answers
819views
How can I store all the lines emitted by while loop in a single varianle in shell?
As far as I know, while loops in shell are executed in a sub-shell, so they cannot modify variables outside the loop. I'm writing a shell script and I want to store all the internal IPs of my machine ...
- 133
