Questions tagged [filter]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
0 answers
5 views

Seeking CUPS filter to convert gray to black

I get a lot of documents containing color for no good reason. I want them printed in solid black with no gray. I see some questions about this here along with some printer-specific suggestions, but ...
user avatar
  • 121
1 vote
0 answers
11 views

How to import Kmail filters into Evolution?

Is there a way to import filters defined in Kmail into Evolution? I know how to export them (Tools → Import/export → Kmail/config), and extract the filters (extract config/filters which describes them ...
user avatar
  • 215
0 votes
1 answer
36 views

How to combine find and cp in linux to copy specific files

I am having the following problem in linux: I need to find specific files from a directory and copy those files (if they exist) into another directory this is the command (i need to find specific text ...
user avatar
  • 3
2 votes
2 answers
74 views

Filtering file list to show only files alphabetically after certain file

I have a huge number of images from which I'd like to feed some to ffmpeg time to time. But I only want to feed ones that are alphabetically after certain image (last frame of previous run, name ...
user avatar
  • 23
-1 votes
3 answers
36 views

How to strip characters by argument?

I want to filter any comma and any double quote mark from output by some command with. For some entries. Pseudocode: removechar --any -, -" Current output could look like any of these lorem, ...
user avatar
  • 115
0 votes
1 answer
119 views

Filtering a file based on values from another file

I have two files file1: U 20 100 1_A 1_A U 14 200 1_B 1_B U 14 300 1_C 1_C file2: D 12 90 1_A 1_A D 15 97 1_A 1_A D ...
user avatar
  • 3
0 votes
1 answer
23 views

How Do I Get `tree` to Selectively Exclude Contents of Directories?

I'm using tree on a directory which has -- among other things -- some Audacity projects in it. Each Audacity project is some file X.aup, along side a directory X_data, which contains a few sub-...
user avatar
0 votes
0 answers
40 views

using mutt and filter emails to be downloaded

i am new with mutt and i really like it. I am new in linux world and my technical english is not the best either, therefore as a last result i turn to this forum. I tried to find in google how the ...
user avatar
0 votes
1 answer
79 views

Stream filtering changing log file in realtime

I have file.log with this sample: 11-Feb-2022 18:34:42 lorem uneeded5 11-Feb-2022 18:34:43 water uneeded6 11-Feb-2022 18:34:44 ipsum uneeded7 11-Feb-2022 18.34.45 waterfall uneeded8 I expect output ...
user avatar
-1 votes
3 answers
57 views

Trim pathname in CSV file

I am struggling over a filter where I am trying to trim data in a specific column of a CSV after the 3rd or nth occurrence of the character \. My data looks something like this: data,data,c:\path1\...
user avatar
0 votes
1 answer
49 views

date string column to timestamp column in a log file

I have log.txt with sample output like these: ... 10-Feb-2022 15:15:14.099 lorem 10-Feb-2022 15:15:15.133 ipsum 10-Feb-2022 15:15:16.233 dolor ... I expect the output of filtered log.txt will be ... ...
user avatar
0 votes
1 answer
38 views

Filter changing file periodically and redirect filtered output to new file

Suppose I have log.txt The sample of log.txt are like these format: Code Data Timestamp ... C:57 hello 1644498429 C:56 world 1644498430 C:57 water 1644498433 ... If I want filter string line that ...
user avatar
0 votes
0 answers
428 views

Copying files from remote to local using lftp in unix

I originally posted this in server fault, but it didn't get much traction. I'm hoping someone here can help. I'm trying to write a script to copy some files from a remote ftp server to a local ...
user avatar
1 vote
3 answers
48 views

How to get the list all files that are x.y but are not z/x.y?

I have a lot of Settings.json files on this machine. I get the list of all of them using: find / -name "Settings.json" 2>&- But some of them are in directories that end to Api. For ...
user avatar
0 votes
1 answer
356 views

nftables refuses to add rules "Error: Could not process rule: No such file or directory"

Problem: When trying to add nft rules, I keep getting "Error: Could not process rule: No such file or directory" Example command: nft add rule netdev filter input ip daddr 10.10.10.10 ...
user avatar
  • 294
1 vote
1 answer
173 views

Linux not responding to public ip ssh request

I'm trying to connect via ssh to my home server from outside of my home network, but I don't get any respond. When I try to locally ssh that server, everything is just fine. But when I do it from ...
user avatar
1 vote
1 answer
115 views

grep -v does not return complement of grep

I want to filter a file for lines starting with a space. I use the following command: grep -v "^ " < input > input_no_starting_space To double check my results, I run the following: ...
user avatar
  • 113
1 vote
1 answer
35 views

Filter phots into directories by date range

I have set up our family mobile phones to automatically backup all photos taken to a NAS (Qnap TS-231P), one folder per mobile. For one phone, for some reason a lot of photos were copied multiple ...
user avatar
0 votes
0 answers
187 views

Illegal "match" error when applying Linux tc, u32 filters mask

I want apply the following rules for TOS based traffic shaping. All rules works but the final rule which mask the IP header shows illegal "match" error sudo tc qdisc del dev tun0 root handle ...
user avatar
1 vote
1 answer
320 views

Defining functions and using map in jq

Can you explain to me how the following two differ? jq ´def addvalue(f): . + [f]; map(addvalue(.[0]))´ [[1,2],[10,20]] => [[1,2,1], [10,20,10]] jq ´def addvalue(f): f as $x | map(. + $x); ...
user avatar
  • 237
0 votes
0 answers
35 views

FFMPEG Multiple Filters (Scale Video + Scale / Apply Watermark)

Can someone please tell me the proper syntax for combining the following filters into a single command? I can't seem to figure it out. The following command is being used to scale the video. ffmpeg -i ...
user avatar
0 votes
0 answers
27 views

IPTABLES Limit connection per ip

I have ubuntu 20 server with nginx, php, etc How i can block ips (http port 80, 443) where connections > 20, but don't block proxy ip 1.2.3.4.5
user avatar
0 votes
0 answers
77 views

tc traffic shaping with HTB and CQB causes packet transmission gap inconsistencies

I am sorry if this is duplicate of https://serverfault.com/q/1076769/822163. I created that first and then realized the Linux and Unix stack exchange is the right place. Problem: When the tc HTB or ...
user avatar
5 votes
1 answer
340 views

How to select based on an allowlist/blocklist using jq

Using jq, how can we select json elements from an array based on inclusion/exclusion of each element's key in some allowlist/blocklist? I want to do a case-insensitive contains (so allowlist/blocklist ...
user avatar
2 votes
1 answer
51 views

How to get a list of latest files recursively with a specific extension and copy them into a folder

How to get a list of the latest files with the extension .jmx recursively and use the file names in another process? I have a list of JMX files organized into different folders and want to pick the ...
user avatar
0 votes
1 answer
60 views

What does this bcf error mean?

I ran this code to filter out biallelic variants from my vcf file: bcftools view --max-alleles 2 --exclude-types indels merged.ecDNA.vcf.gz>merged.ecDNA2.vcf.gz However, I got an error message: [E:...
user avatar
0 votes
0 answers
34 views

iptables rules to restrict IP with/without Tunnel Example

I have question about iptable: Lets consider the following example from my book: We have host IP 192.168.1.58 which is accessible through public network and we know the public IP of each user. Is it ...
user avatar
  • 1
4 votes
4 answers
1k views

Extract values from a string that follow a specific word using sed

I'd like to extract only a specific value from command output. The string that the command returns is something like this: Result: " 5 Secs (11.2345%) 60 Secs (22.3456%) 300 Secs (33.4567%)" ...
user avatar
-1 votes
1 answer
45 views

How to compile lines with a certain word in the last column into a separate file?

I have a csv file and I need to filter it out into two files based on whether the last column contains the word "ecDNA". I already have two more copies of the file to edit without changing ...
user avatar
2 votes
3 answers
100 views

BASH Script - Reading output and cutting by value

I am trying to create a BASH script that will run a command, filter the output of that command and then read the results of that output to then print only sections that meet the given requirement. For ...
user avatar
0 votes
0 answers
35 views

Filter csv file with AWK passing a variable in the regex [duplicate]

I need to filter a very large csv file in the most efficient way. I already tried csvgrep but is not efficient timewise, so I'm now trying to use AWK for this task. The csv file has a ; separator, and ...
user avatar
0 votes
4 answers
58 views

reading and discarding lines

I have a question about a problem that I have to solve, I have my lines in this way: Input GTEX-1117F-0003-SM-58Q7G GTEX-1117F-0003-SM-5DWSB GTEX-111CU-0826-SM-5EGIJ GTEX-111CU-0926-SM-5EGIK GTEX-ZZPU-...
user avatar
1 vote
1 answer
624 views

Only show entries of the last hour of log file

I have a huge logfile access.log with entries like: 192.11.111.111 - - [05/Mar/2021:00:00:02 +0100] "GET ..." 192.250.14.80 - - [05/Mar/2021:00:00:09 +0100] "GET ..." 12.249.66.42 -...
user avatar
  • 11
0 votes
0 answers
982 views

Linux tc filter add - errors RTNETLINK answers: Operation not supported

I'm working on the network simulation to create some traffic on specific ports , and trying to inject the network delay. I'm using the linux tc utility to do this operations. So i'm new to the tc ...
user avatar
0 votes
1 answer
52 views

Filter directory tree and create bash menu from results

I have a Google Drive folder in the cloud that I sync with my server to backup and restore a WordPress web directory and MySQL database dump and I accomplish this with rclone. I am able to see the ...
user avatar
0 votes
1 answer
122 views

BlueTooth device(output) and PulseAudio's module-echo-cancel help needed

I'm trying to run PulseAudio's 'module-echo cancel' filter on my bluetooth speaker(output only). I've edited /etc/pulse/default.pa like that: .ifexists module-echo-cancel.so load-module module-echo-...
user avatar
0 votes
2 answers
130 views

Limit SSH to a range of IP

I work with OpenBSD and I want to limit the port 22 for all user who have an IP between 192.168.42.40 - 192.168.42.60. But I don't know how to do this. I need to modify the packet filter ? (SSH is on ...
user avatar
0 votes
1 answer
116 views

Mail processing with custom script on Postfix and Plesk (plesk_virtual)

I'd like to parse incoming mail with custom script. Something which would be easily done with man aliases(5) for real users or with procmail for vitual users. But on my system is is plesk and setup is:...
user avatar
  • 1,273
1 vote
1 answer
38 views

Match contents of first file with second to generate third file

Sample data of my first file first.txt is below: 10.0.0.1,Web Server,comments1,jboss is older version,myappcode1 10.0.0.3,Web Server,comments4,httpd is latest version,myappcode15 10.0.0.7,Web Server,...
user avatar
  • 307
0 votes
1 answer
151 views

Qemu network traffic filtering with iptables

I need to filter both outcoming and incoming traffic of the guest system on Qemu (Linux). The host system is Linux too. I think iptables is a good tool, but I don't know how to use it here. What ...
user avatar
  • 109
-1 votes
1 answer
117 views

rsync only particular file types in subdirectories with a fixed maximum depth

I want to sync all *.sh files in exactly one sub directory. I tried this cmd but all files in a directory are synced instead of only particular file types. rsync -vr -n --include="*.sh" --...
user avatar
0 votes
2 answers
30 views

how can i pull data based on certain flags for rows of data and create a new file with them

I'm working with Upper Air Balloon data with a format of .... **254 12 1 JAN 2002 1 94703 72501 40.87N 72.87W 20 1116** 2 100 100 250 40 32767 3 **3 ...
user avatar
0 votes
1 answer
3k views

filter by incoming ip v4 packets with tcpdump

I want to filter with TCPDUMP only incoming and ip v4 packets. tcpdump -i eth0 inbound and ip -w res.pcap give me incoming packets with ipv4 and ipv6 How can I filter by ipv4 only?
user avatar
  • 69
-1 votes
1 answer
415 views

postfix modify subject based on sender

There is a map: email1@example.com ONE email2@example.com TWO email3@example.com THREE How to change subject in mails sent to test@example.net this way: (from email1@example.com, original subject ...
user avatar
0 votes
1 answer
543 views

Filter rows of a file by list of a second file

file1.tabular contains information of 'elements' over 3 columns. element1 235 oval red \ element2 334 oval red \ element3 356 rectangular blue file2.txt contains a single column element1\ element3 I ...
user avatar
0 votes
3 answers
2k views

How to limit grep to scan only the first 10 lines?

I got a command foo that output a list of files separated by \n line. I am using the below command to filter the results by regex content of the files. foo | xargs grep -l regex The problem is that ...
user avatar
1 vote
2 answers
860 views

Filter a list of files by content

I got a command foo that outputs a list of files separated by a new line. How can I filter those files by their content using regex, and output the filtered files list?
user avatar
1 vote
1 answer
124 views

Picking selected items from stdin via choices typed into console

Can anyone point me at a 'pick' filter script that works somewhat as described below? I've spent about an hour hunting for a simple bash script/filter that will allow me to pipe in a list of values ...
user avatar
  • 113
0 votes
1 answer
74 views

searching logs for failures using grep with wordlist?

I am building a wordlist which will contain words like error,fail,kill,warn,out of,over,too.....etc. so that I can filter tons of logs for issues within seconds using grep. Especially, it's for ...
user avatar
  • 932
0 votes
1 answer
21 views

Save "unseen" output of command to file

I have a program that returns some content every time I run it. Some of that content may have already shown during the last run. foo bar baz and on next execution it might show two "old lines" and ...
user avatar
  • 3,294