All Questions
17 questions
-1
votes
1
answer
45
views
I can't grep some inputrc string
bind -p |grep -E "\\e.\":" work
but
bind -p |grep -E "\\e\\C-.\":" don't work
I tried a lot of combination
- 11
-1
votes
5
answers
169
views
add empty line before every line that contains certain characters
I have a lot of markdown files that contains something like this:
* header A
- item 1
- item 2
** sub-header A1
** sub-header A2
* header B
- item 1
- item 2
** sub-header B1
** sub-...
- 181
1
vote
1
answer
112
views
How to delete a string in my files?
So I want to match all below then remove those lines of string.
[MTT-5634](https://my.atlassian.net/browse/MTT-5634)
[MCC-123](https://my.atlassian.net/browse/MCC-123)
[MTT-7965]: https://my.atlassian....
- 13
0
votes
2
answers
1k
views
How to delete everything before the occurrence of a regex pattern per line in a bash variable
I've got a bash variable containing several lines of text, which includes IP addresses, and I need to remove 'everything' before the last IP address occurrence in the same line.
This:
43.12.40.53 ...
- 141
3
votes
3
answers
12k
views
Modifying a shell variable with regex (bash)
I have a shell variable for example. a="big little man". How do I use regex in bash print out the variable with only the middle word capitalized? (big LITTLE man)
I can do it by separating the ...
- 133
0
votes
1
answer
625
views
String validation using regex posix class
I'm trying to build validation for an address field in a file
The file is like so;
123 Strata Ln.
15 138th Ave
27 Hilltop Dr. Apt. 7
F52 Milk Ln.
156A Fantastic St.
56 sample Ln.
These are the ...
- 103
1
vote
1
answer
294
views
Replace literal space with regex space
I want to change a string from
This is a string
to
This\sis\sa\sstring
but tr is not working for me no matter if I escape the \ or not
string="This is a string"
regex=$(echo "$string" | tr " " "\\s"...
- 313
6
votes
1
answer
8k
views
Why does the regex in bash works only if it is a variable and not directly? [duplicate]
So why does the following works i.e. prints out the match:
THE_REGEX='^test\/version[0-9]+([.][0-9]+)+$'
if [[ "$SOME_VAR" =~ $THE_REGEX ]]; then
echo "Match!"
fi
But the following does NOT:
if [...
- 1,459
6
votes
2
answers
13k
views
String pattern-matching with =~
I have problems to understand the string pattern matching with =~ in bash.
I wrote following function (don't be alarmed - it's just experimenting, not a security approach with md5sum):
md5 () {
...
- 10.8k
5
votes
2
answers
5k
views
Extract Sub-Directory Path from Partially Known Directory
Lets say I've got the following directory structure:
base/
|
+-- app
| |
| +-- main
| |
| +-- sub
| |
| +-- first
| | |
| | +-- tib1.ear
| ...
- 153
21
votes
3
answers
6k
views
Does bash support back references in parameter expansion?
I have a variable named descr which can contain a string Blah: -> r1-ae0-2 / [123], -> s7-Gi0-0-1:1-US / Foo, etc. I want to get the -> r1-ae0-2, -> s7-Gi0-0-1:1-US part from the string. ...
- 8,006
4
votes
1
answer
3k
views
Bash regular expression pattern matching spaces, within double brackets test, using "~=" operator
Simply said, I just can't find a way to match a variable against some pattern containing spaces.
Here is what I expected to work (echo 'ok' string)
item='foobar baz'
pat=".+bar baz"
if [[ "$item" =~ ...
- 341
13
votes
4
answers
14k
views
How do I extract parts of a string to variables?
I have a line from some file like this:
attempting to create a 512^3 level (with Dirichlet BC) using a 16^3 grid of 32^3 boxes and 800 tasks...
I want to extract the 512^3, 16^3, 32^3 and 800 four ...
- 536
0
votes
2
answers
1k
views
Bash regex string manipulation bug
I have an issue with bash and its regex match ability that I for now think is a bug in bash but could also be me having missed something obvious. I hope it is the latter.
I have made this function in ...
- 101
1
vote
3
answers
1k
views
Bash Combine Replacement and Sub String Extraction in One Step
For a string in this format:
./my-site.sub.domain.com
I would like to remove the .,-, and /, and trim the remainder to 16 characters: mysitesubdomainc
I've done this
mysite="./my-site.sub.domain....
- 2,264