All Questions
724 questions
0
votes
1
answer
37
views
Counting unique IP addresses per hour in existing log files
I am trying to determine the number of unique web visitors to my website each hour. The log files (access*.log) contain many lines looking similar to this.
192.168.211.85 - - [29/Sep/2024:10:17:02 -...
- 309
-1
votes
2
answers
62
views
extract multiple words from git log
I need to extract multiple words from git log.
I need the commit id and ticket number for each commit, I then need to run this through a loop and do some further processing for each commit.
commit ...
- 331
3
votes
2
answers
113
views
What explains this very odd behavior of GNU grep interacting with buffering and pipes and how to stop it?
This is best illustrated with an example I feel:
{ printf 'foo\nbar\n' ; sleep 2 ; } | grep -m1 foo
{ printf 'foo\n' ; sleep 2 ; printf 'bar\n' ; sleep 2 ; } | grep -m1 foo
Both of these commands, ...
- 171
0
votes
5
answers
104
views
Why can't add the header in the df's output?
Get all processes whose name contain firefox and exclude grep process,it is no use to show all processes here,omit many lines.
ps aux | grep [f]irefox
debian 7069 1.0 4.4 3134148 359168 ? ...
- 437
-1
votes
2
answers
67
views
set output into variable from grep from input variable
whats wrong with this bash script:
acme2=$(dig txt @$1 _acme-challenge.$1.de)
acme3=$(echo $acme2 | grep "^_acme") ...
- 1
0
votes
4
answers
172
views
bash - slice quoted substrings delimited by spaces into array
following example:
string=" 'f o o' 'f oo' 'fo o' "
array=($string)
echo "${array[0]}"
outputs:
'f
while the expected output is:
'f o o'
The only solution I came with is by ...
- 39
0
votes
2
answers
131
views
variable assignment doesn't create one same object at least for grep
The problem is as follows (Here I don't use find since it doesn't support double-asterisk wildcard **):
$ FILES=(foo/**/*.suffix bar/**/*.suffix2)
$ grep baz "${FILES[@]}" # works
# I use ...
- 173
0
votes
0
answers
40
views
How to ALSO print the first line using grep [duplicate]
I quite often find myself using grep in cases where it would be very handy to have grep print the first line of the result along with the matched lines. This is not limited to Kubernetes (I'm not ...
- 164
1
vote
2
answers
90
views
Need to identify executable files via boolean shell test construct
I am trying to symlink executable files to a bin directory within a docker script. I need a way to identify executables and return boolean status. I've been trying this:
for i in ../src/u-boot/tools/...
- 131
0
votes
2
answers
44
views
Capture and print on the exact match from a file
I am trying to use grep to match only a specific part of a row in a file.
The file is a huge csv file with some columns containing json with commas so it is hard to figure out which column what I am ...
- 161
-2
votes
4
answers
70
views
gnu grep multiple filters in one regex [closed]
RHEL 8, if it matters.
I need to find all the rows in a text file which match these three filters:
cut -f1 -d: .pgpass | grep ^FISP | grep -E 'CDS|TAP' | grep PGS401
FISPCDSPGS401A
FISPCDSPGS401B
...
- 1,184
13
votes
3
answers
933
views
Inconsistent “unzip -l … | grep -q …” results with pipefail
The following Bash function gave inconsistent results:
# $1 Path to ZIP archive.
# Exits with 0 status iff it contains a “.mp3” or “.flac” file.
mp3_or_flac_in_zip() {
local archive=${1:?No ...
- 389
-2
votes
4
answers
112
views
How to get either a substring or a text value using awk and if?
I can't figure out how to write a simple ping log. I only need either the ms value or the words "no connection".
I have myping=$(ping -c 1 10.0.10.1). I only need the value between "...
0
votes
3
answers
88
views
Need to make multiple multiline replacements in file
I have a file with multiple "paragraphs" like this:
<type>TRANS</type>
<attributes/>
<specification_method>rep_name</specification_method>
<trans_object_id/&...
- 11
-2
votes
2
answers
138
views
How to diff two files in bash efficiently?
I have two files containing the similar pattern:
cmd1 [cmd2 {xx/xx[7] x/x[0] ...}] cmd3 [cmd4 {xx/x[12] ...}]
cmd5 [cmd6 {x/x[1] xx ...}]
I don't need to consider all the cmds in two files. Only need ...
