Questions tagged [pattern-matching]
The pattern-matching tag has no usage guidance.
161
questions
0
votes
0
answers
22
views
replace both filename and filename's content relying solely on pattern found on the name-of-the-file
I'd like to know if it's possible to replace both filename.ext and a matched pattern inside its content regarding a pattern founded on the filename itself using sed (and grep also, maybe?).
Let me ...
- 13
0
votes
1
answer
214
views
Searching for a pattern in a binary file using python script
I want to find repeated copies of the config section within the partition dump (binary file), using pattern and 'magic' header. The config section always starts with 202 '0xff' bytes followed by 4 ...
- 511
0
votes
1
answer
58
views
Bash: Difference between "Pattern Matching" and "Filename Expansion" in the context of parameter expansions that do matching
Edit: Question ansewered by Gordon Davisson's comment
I was reading the GNU Bash manual, and I noticed that there are basically three types of "Parameter expansion" that do pattern matching:
...
- 166
3
votes
3
answers
485
views
Find files matching one pattern, but not another, using grep, awk or sed [duplicate]
I need to locate .php and .pl files that do not contain one string (e.g. aaa), but do contain another (e.g. bbb).
I'm currently using this command:
find /path/ \( -iname '*.php*' -or -name '*.pl*' \) -...
- 2,545
4
votes
4
answers
626
views
grep multiple patterns with differing number of matching groups?
I'm trying to tally insertions and deletions from git diffs.
I have the following, which when piped one or more strings of the form "4 files changed, 629607 insertions(+), 123 deletions(-)" ...
- 143
1
vote
0
answers
51
views
does "find -name " matches the whole path or just the basename?
I was getting inconsistent results with pattern matching using -name, -iname, especially when looking for files -type f or directories type -d. Can someone explain under which circumstances -name ...
- 43
0
votes
3
answers
438
views
Glob pattern matching comma separated numbers
I want to write a glob pattern to match numbers separated by commas. What would the pattern be like?
Here are some examples
5
5,8,13
Have started with the following, but there some problem with it, ...
- 1,183
0
votes
2
answers
53
views
How to combine files from incrementing directories into one directory
I have a directory structure that follows this kind of pattern:
- Dir 01 (Disc 1) \
- Dir 01 (Disc 1).iso
- Dir 01 (Disc 2) \
- Dir 01 (Disc 2).iso
- Dir 01 (Disc 3) \
- Dir 01 (Disc 3).iso
- ...
-2
votes
1
answer
52
views
Determining repetitions of 8-tuples [closed]
I have 16 collections of 8 numbers
(11 12 11 44 11 12 11 23)
(12 21 11 44 11 12 11 23)
(11 42 21 13 12 21 31 14)
(11 42 21 13 12 21 11 34)
and so on
I want to find whether there are repetitions of ...
- 1,183
2
votes
2
answers
1k
views
Sed based on 2 words, then replace whole line with variable
I have a txt file looking like this,
1:Ana:apple:08:00:wait
1:Joe:banana:08:30:wait
1:Oscar:orange:08:45:ready
1:Monica:apple:08:50:ready
1:Mark::orange:ready
I have to find only the first line that ...
0
votes
3
answers
250
views
Need to grep the word right next to or below a pattern
I have a file with the following lines in i:
.......... FROM ABCD_EXT
.......... FROM HEG_EXT1
.......... from
xyz_EXT
.......... FROM abd_EXT2
..........where QWT_EXT.SID=POI_EXT....
- 31
0
votes
1
answer
89
views
how to detect unbalanced special characters in string
I'm wondering what would be the best way (likely using grep or ack) to return lines containing unbalanced special character sets in a string? For example, if the string were:
bqM#+t1U"OyBGhk]ozVG[...
2
votes
2
answers
157
views
How does this glob expression remove colons?
Say we have a file called "Hello World: The easiest program" and its name is saved in a variable called "title".
I want to match this with glob pattern matching, but remove the ...
1
vote
2
answers
30
views
How to match the starting of string & then replace some value using the pattern in bash
vm0 host=10.182.35.1 controller=True
vm1 host=10.182.35.2 controller=False solution=abc
vm2 host=10.182.35.3 controller=True solution=abc
vm3 host=10.182.37.4 controller=False solution=xyz
vm4 host=10....
1
vote
2
answers
34
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How can I delete everything before and afrer match pattern from pdb file?
I'm beginner in bash scripts, but I try to delete everything in my pdb file (test.pdb) before REMARK time 20.00 and from REMARK time 30.00 to the end of this file. I'm using to this sed command, which ...
- 11
0
votes
1
answer
47
views
Remove/move files in a directory with filename timestamp pattern
So I have files that need to remove/move/filter.
All files have this pattern like this in a directory, let's say directory frames contain this pattern filename timestamp_in_nanosecond.jpg.
And this is ...
0
votes
2
answers
263
views
Extract all links (including multiple links per line) in markdown file
Sample markdown file:
cat index.md
# Abstract
- To achieve [Work Life Balance](./WorkLifeBalance/WorkLifeBalance.md), first understand what it means and what are the requirements.
- Develop right **[...
- 1,700
0
votes
1
answer
186
views
Remove certain words and set word at end of string in files
I have a bunch of files that contain strings similar to:
Get<1>(abc)
Get<2>(xyz)
How can I recursively search for all files with the above pattern and remove everything before the first '(...
- 101
6
votes
2
answers
2k
views
Exclude patterns from glob match
My directory looks like this:
$ ls
total 0
-rw-r--r-- 1 user user 0 Jun 18 22:44 file0
-rw-r--r-- 1 user user 0 Jun 18 22:44 file1
-rw-r--r-- 1 user user 0 Jun 18 22:44 file2
-rw-r--r-- 1 user user 0 ...
- 101
0
votes
1
answer
81
views
Sum sizes of certain folders/files with inclusion and exclusion patterns
I'm looking for a tool that gives me the total size on disk of certain folders and files. It should be able to unambiguously include or exclude items and all of their children (folders and files in it)...
- 11
1
vote
2
answers
133
views
how to check for existence of multiple patterns in bash
i have several patterns that include ** wildcard, let them be:
foo/**/bar.xml
foo/**/baz.xml
and i have an example dirtree:
$ tree foo/
foo/
└── deep
├── baz.xml
└── even
└── deeper
...
- 163
-1
votes
2
answers
754
views
awk no print if value from file1 not match value in file2
file1:
G A 4
H B 3
I C 2
J D 1
file2:
M H 6
N H 5
O K 4
P J 3
Q I 2
R I 1
S G 0
T L 1
Desired:
M H 6
N H 5
P J 3
Q I 2
R I 1
S G 0
print only rows where $2 from file2 matches $1 from file1
I'm ...
- 1,889
0
votes
2
answers
208
views
match number range with non significative zeros in zsh
I have in a directory files like this :
booklet-001.pdf
booklet-002.pdf
booklet-003.pdf
…
booklet-997.pdf
booklet-998.pdf
booklet-999.pdf
Then, I whant to match the files numbered from 079 to 256. ...
- 1,130
1
vote
0
answers
53
views
How to find the PHP file which prints an HTML element with a certain selector?
I store my MediaWiki 1.36.1 website with Skin:Timeless on NameCheap with a shared hosting environment with Cpanel file manager and SSH shell access.
In my website, there is a certain footer element ...
- 11
2
votes
1
answer
117
views
ZSH expanded variables in [[ ... ]] do not perform globbing
I have extended_glob set in .zshrc.
this works as expected:
[[ "value" = [a-z]* ]] && echo "globbed"
Prints "globbed".
But this does not:
foo=[a-z]*
[[ "...
- 123
5
votes
9
answers
1k
views
How to put text inside text automatically?
I need to put one text inside another text.
1) I have a file with list of input values:
A1
B2
C3
D4
E5
I have a wrapper pattern which should contain the text:
$wgSpecialPageLockdown['...
- 113
8
votes
2
answers
2k
views
Avoiding non-zero exit code when running `ls` using multiple patterns
Say I have two possible paths I want to list directories and files under on a Linux machine:
/some/path1/
/some/path2/
If I do the following in tcsh, I get 0 exit code, if at least one of path1 or ...
- 245
0
votes
2
answers
35
views
How to extend a wild card option to include js and ts
I have an alias set as follows:
alias ppp='prettier --write "**/*.js"'
I want it also to do all my .ts files. I'm quite inept at wild card expressions sadly.
- 103
7
votes
1
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313
views
Is "warning: range of the form `[o-b]' is locale dependent" a bug in gawk 4.1.0?
While writing some awk code I was using the --lint option for gawk 4.1.0.
To my surprise I get a warning
warning: range of the form `[o-b]' is locale dependent
but my code has only a foo-bar outside ...
- 1,104
4
votes
3
answers
1k
views
Is there a way to make find use shell's extglob shell option?
In short, I instinctively wrote a command like this to find the two files prefix.ext and prefix_suffix.ext down a hierarchy
find /some/path -type f -name 'prefix?(_suffix).zip'
but it doesn't work.
...
- 1,471
5
votes
1
answer
609
views
Using anchor ^ pattern when using less / search command
When navigating through Linux man pages, sometimes you need to query the meaning of flags like -p or -al in the man pages.
The default text reader for man pages is less and I'm trying to use the / ...
- 329
0
votes
1
answer
391
views
select lines in file with same string pattern
Let´s suppose I have the following file.txt:
asiub
sj
abq
b aia
ainp oo
test = 123d
sub ,.
aiba 87ab
test = 129szs bq
test = aqua
ayqvq 133s
I want to print only the lines of file.txt that contain ...
- 141
0
votes
1
answer
147
views
Rsync: Clone structure for specific pattern [duplicate]
How can one recursively copy all files of a specific pattern (*.tpl) using rsync?
Example:
/etc/test.tpl
/etc/dir/test.tpl
/etc/dir/**/test.tpl
- 115
1
vote
6
answers
882
views
print lines between 1st occurence of 1st pattern to last occurence of 2nd pattern with AWK
I have a datafile, with dates in 2nd column
# cat datafile
-;20210106;-;-;-;
-;20210112;-;-;-;
-;20210112;-;-;-;
-;20210112;-;-;-;
...
-;20210217;-;-;-;
-;20210217;-;-;-;
-;20210217;-;-;-;
-;20210217;-...
- 1,889
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0
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49
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Capturing comment character from matching pattern
I would like to pick out lines from a file matching
# Mode: org
# can be any comment character for the programming language of the file.
Rather than #, in could also be any of ; or !, with any ...
- 1,183
0
votes
2
answers
97
views
how to perform multi substitution with sed on a block of text?
I have text file, and in it has a block that has pattern like below:
# cat file
Jit .... enabled=false
Jit ..shoes.. From=2021-01-01
Jit ..gloves.. From=2021-01-01
so I want to change all of these ...
- 1,889
-1
votes
4
answers
1k
views
Linux - Find all occurrences of a certain pattern in a line of a file
I have a file in Linux which contains a line like :
(memberOf=CN=Group1)(memberOf=CN=Group2)(memberOf=CN=Group3)(memberOf=CN=Group4)
My goal is to populate the list of groups that is present in the ...
- 1
0
votes
1
answer
373
views
How to not print the output if the second pattern does not match
file1:
pattern1
a
b
c
end
cmd=>
cat file1 | sed -n '/pattern1/,/pattern2/p'
output=>
pattern1
a
b
c
end
How to not print the output if the second pattern does not match?
Desired output:
...
1
vote
6
answers
2k
views
match some or all patterns with awk
I have a small problem with awk multiple pattern matching which I cannot figure out. I have the following awk line:
awk '/pat1/{v1=$4; next} /pat2/{v2=$5; next} /pat3/{v3=$6;next} /pat4/{v4=$5; print ...
- 299
2
votes
1
answer
40
views
Loop through file with unique identifer and compute cumulative sum
I have a large text file, as shown below, where column1-colum3 define a region and fourth column is unique identifier. The column 6 is assigned value of the region.
chr6 26204834 26204839 ...
- 105
1
vote
2
answers
735
views
Why does "grep -w" match words followed by hyphen/minus ("-")?
I need to ask you about using grep command in a Bash script in Debian.
I have got for example file with these lines:
/fruit-/apple.txt
/fruit-/banana.txt
/fruit-/samples
/vegetables-/carrot.txt
/...
- 45
2
votes
1
answer
1k
views
How can grep return a different number of matches?
I need to grep a file (24 lines) into two files (which are kind of big).
The original files contains 24 lines that resemble this string:
AATGGACGCTTAAC[A|C|T][A|C|G]CGGC[A|T]TCGGAT
I do the following:...
- 381
2
votes
1
answer
220
views
Search for long string (>50 characters) and record match
I have a piece of code that looks for a string and then records if that matches. The code works fine when the string is not longer than 50 characters. However above this, say for a string of 100 or ...
- 27
1
vote
2
answers
258
views
grep partial ip number from the file
I have to sort IP addresses into classes, so I can block entire class in myfirewall. It works fine when I try to do for /24 class, but not so well when do for /16 class. I have a list of IPs in the ...
- 76
3
votes
2
answers
559
views
Awk regex for operators
I want to count and sum number of matches in a file with my awk regex.
The file file contains:
Gra pes
gra ndma
straw berry
blue Berry
banana
peanut
school
I need to make a regex for pattern matching,...
- 45
0
votes
1
answer
222
views
case-substring function and quoting
i use a simple function in a script in order to ckeck if a string contains a particular substring:
#!/bin/bash
#
subs() {
case $2 in
*$1*)
return 0 ;;
*)
...
- 3
-1
votes
2
answers
358
views
Finding files and matching patterns with printed filename in bash
I have the following code that lists matches far a pattern ptrn, with the filename being printed before the listing (which uses the context option -C NUM)
find "$fdir" "${isufx[*]}"...
- 371
1
vote
3
answers
2k
views
Matching a valid version number inside case statement
I want to match a version number inside a case statement. The version number could look like this
1.12.0.32
1.12.0.32.1
2.10.0.30.1.2
and is stored inside a shell variable: version.
As I searched on ...
- 375
0
votes
1
answer
163
views
Instruct shell script to do a task if the output of a program contains a specific word
I need to create a program in Bash that launches a command, check if the result contain a word, and do something if it does.
Example: I need to check if a printer is online with
lpstat -p [printer ...
- 1
7
votes
1
answer
4k
views
How to refer to matched groups in jq gsub?
Using jq, I want to search for a pattern via regex, and wrap the matched string with something like <div> tags
$ echo "\"This is a valid json file"\" | jq '. | gsub("...
