All Questions
15 questions
1
vote
6
answers
226
views
manipulate ls text output to add path to filenames
I get sometimes files with following ls output format:
/etc/cron.d:
-rw-r--r-- 1 root root 128 May 15 2020 0hourly
-rw------- 1 root root 235 Dec 17 2020 sysstat
/etc/cron.daily:
-rw------- 1 root ...
3
votes
5
answers
3k
views
Bash - remove dashes and new-lines before replacing new-lines with spaces
I have a bunch of text files in the following format:
Lorem ipsum dolor sit amet,
consetetur sadipscing elitr,
sed diam nonumy eirmod tempor
invidunt ut labore et dolore
magna aliquyam erat, sed diam
...
- 6,074
1
vote
1
answer
255
views
Keep all line breaks except the last one using awk
How do I modify this line below to capture the content between two lines without the trailing line break?
interesting="$(awk "NR >= $first_line && NR <= $second_line" $file_path | ...
- 113
1
vote
2
answers
46
views
how do i add the creation of a directory to this cli command
I'm traversing a directory, looking for subdirectories, finding certain files, and copying them someplace else... I'm doing this:
for i in `ls ./*/filename`; do cp $i ../test2; done
This takes all ...
- 11
0
votes
1
answer
215
views
Bash User Input Search For Who is On Server If Statement Error Too Many Arguments
I am working on an assignment that requires me to accept user input to search for current users on the server and if the user input is online, I need to output the users name. If the user is not ...
1
vote
4
answers
6k
views
How do I loop over the lines in STDIN and run a shell command?
I'd like to run a shell command on each line taken from STDIN.
In this case, I'd like to run xargs mv. For example, given two lines:
mfoo foo
mbar bar
I'd like to run:
xargs mv mfoo foo
xargs mv ...
- 3,422
1
vote
3
answers
990
views
How do I make a substitution to `$0` but save the old value?
I'm trying to rename all files that start with an "m" to be the same name except with the first character (or "m" in this case) stripped away.
My strategy is to:
List all the files, with ls
Filter ...
- 3,422
6
votes
4
answers
78k
views
grep all strings that start with a certain char, and finish with another char
I need to grep all strings that start with "[" and finish with a certain string, e.g. "apal". So all chars in between these 2 chars would be shown as well. Given an input such as:
[44060]apal223reaea[...
- 459
6
votes
6
answers
5k
views
Command line method to find repeat-word typos, with line numbers
Updated: Clarify line number requirement, some verbosity reductions
From the command line, is there a way to:
check a file of English text
to find repeat-word typos,
along with line numbers where ...
- 3,579
5
votes
1
answer
7k
views
OSX: Delete all matching certificates by command-line
Using shell script to delete all matching certificates.
I found a list of certificates using:
security find-certificate -c "certificatename" -a -Z|grep SHA-1|awk '{ print $NF }'
Output is like this:...
- 153
3
votes
2
answers
12k
views
How to insert bash variables in awk? [duplicate]
How to insert bash variables in awk (for example i need to do in in some for loop - like this: in first iteration use awk to search string by first column, next by second column and so on with using ...
- 1,093
3
votes
2
answers
1k
views
Assign specific line from a variable to another variable
I would like to take a specific line from a variable to another variable.
I tried this but it doesn't work:
c="1.apple
2.banna
3.peach"
read "Please choose fruit [1-3]:" t
a=$c | awk "NR==$t"
echo "...
- 31
2
votes
2
answers
2k
views
Extracting values from a file keyed by multiple keys
Consider a file with key=value pairs, and each key is optionally a concatenation of multiple keys. In other words, many keys can map to one value. The reason behind this is that each key is a ...
- 1,273
14
votes
6
answers
121k
views
How can I output the difference between 2 files?
My file consists of the the following; roughly:
username:username:username:username:username
The above line continues to about 600 characters.
I use the awk command in order to use it as an ...
- 315
2
votes
1
answer
2k
views
Safely convert unicode strings to printable characters
I have many HTML files containing mixed unicode strings like \303\243 and printable characters like %s. What I'd like to do is converting the unicode strings into printable characters in a safe way.
...
- 4,782