Questions tagged [command-line]
The command-line is the interactive interface to your shell.
2
votes
2answers
22 views
How to include custom command options in a bash script with $1 and $2?
I have a script myscript.sh
#!/bin/sh
echo $1 $2
which is used something like ...
./myscript.sh foo bar
which gives me an output of ...
foo bar
but how can i make this script include custom ...
5
votes
8answers
303 views
Separate the element after every 2nd ',' and push into next row in bash [duplicate]
An example of my file looks like this:
201012,720,201011,119,201710,16
Output I want:
201012,720
201011,119
201710,16
1
vote
1answer
34 views
Linux command that continuously outputs string of text
At some point I used a shell command that continuously sent a very short string of text to the standard output, but at this moment I can't recall it's name.
Its name was something very short, like '...
-1
votes
1answer
37 views
Redirecting with yes > /dev/null & top
I am following a tutorial
yes > /dev/null & top
Output
I do not understand what this line is doing.
Top only
It seems that I have one process less.
Why?
0
votes
1answer
65 views
How can I open terminal and run command automatically?
I'm in the terminal emulator. I want to open another terminal to run a specified command.
gnome-terminal -e "zsh -c 'pwd; zsh;'"
That runs pwd and zsh consecutively and successfully in another ...
3
votes
1answer
139 views
Why does my date output have “STD” as the time zone?
When I run date on my Ubuntu under WSL, it prints:
Wed May 15 19:33:37 STD 2019
Why does this have the string STD in it? I can't find a timezone online with the abbreviation STD (for example here) ...
0
votes
2answers
40 views
Concatenate the Content of Files from Various Directories with a Blank Line in Between
I have the file dir1.txt that contains the names of the following directories:
2
3
4
Directory 2 contains files 2_1.txt and 2_2.txt
Directory 3 contains files 3_1.txt and 3_2.txt
Directory 4 ...
0
votes
2answers
40 views
Run ssh command without quotes
You can execute a command on a remote server using
ssh user@host 'the command'
but is there a way to execute the command without quotes?
(I am on BSD and using OpenSSH)
1
vote
1answer
26 views
How do I save image produced by asciiview?
When I run command asciiview image.jpg I'm able to view image in the terminal and quit browser using q key. I've tried different ways to redirect the output of the asciiview image.jpg to the console ...
-1
votes
1answer
27 views
How can I run only a portion of a command line in a user built shell?
I make a shell that takes arguments in a command line with special conditions on what it is able to do.
For example, anything that appears after the # character will be considered as a comment and ...
4
votes
1answer
199 views
stdout and stderr redirection to different files
How can I redirect stdout to 2 different files and stderr to another, different file?
I want something like <my_cmd> 1> file1 file2 2>file3
I know:
<my_cmd> | tee file1 file2 > /...
2
votes
2answers
50 views
find -exec and increment counter / progress
TL;DR:
Q: How to keep a counter in find -exec loop ?
My use-case:
I need to move a lot of directories which are scattered around the place, so I do
find . -type d -name "prefix_*" \
-exec sh -...
-2
votes
2answers
114 views
How to manipulate numbers in a file"? [on hold]
I attached both picture and *.txt file https://1drv.ms/t/s!Aoomvi55MLAQh1jODfUxa-xurns_ of a sample work file. In this file Reactions which only start with "r1f", "r2f", "r3f"......and so on. And ...
1
vote
2answers
50 views
how can I merge multiple column in one column and separated by '-'?
I have a table as below:
1 10 15
2 2 25
1 10 26
I like to merge them and make a new column in linux, like below:
1 10 15 1:10-15
2 2 25 2:2-25
1 10 26 1:10-26
0
votes
0answers
11 views
colorchange in less status line
based on this, this and this questions I have tried to build a status bar with a dynamic part (line number, file name etc.) and a static part. (I am old and can't remember the useful shortcut all the ...
1
vote
1answer
20 views
Connect to fastest open WiFi (that can reach the Internet) and keep looking if cut off?
I know this is a Very Bad Idea™️ with regards to security, I'm ok with that. (Everything is over SSL, so meh.)
I have a small wandering Raspberry Pi powered bot, that I'd like to keep in touch with. ...
0
votes
0answers
25 views
Download specific Kodi version on Raspbian
I have installed minimal Raspbian on my Rpi 3. On top of that, I installed Kodi. So far so good.
However, the add-on I want to use does not deal very well with Kodi 18 so I would like to install the ...
-1
votes
1answer
30 views
Clarification on the gpg command (No such file or directory)
I'm facing issues while executing the below command. Saying that No such file or Directory. I checked in the system and there were No such directory exist.
gpg: can't open `/root/.secrets/...
8
votes
3answers
825 views
Adding command shortcuts to /bin
Is there any way to add custom commands to /bin?
For example, I use docker container ls a lot, and would like to turn this into a shortcut command, like dcls.
If I add a file named dcls to /bin and ...
0
votes
1answer
49 views
how can i make grep/find/locate beep as it finds each match
I am looking for files, since I added a backup external HD. I want to continue working elsewhere, while find/grep/locate find a file. As a match is found, I'd like to be alerted so that i can stop the ...
1
vote
3answers
84 views
List files and directories that a user has permission to
How can one list the content of a directory but only show directories and files that a user has Read access to?
I have worked out this but it only lists files owned:
find /dir/to/search -user ...
-1
votes
1answer
51 views
Folding terminal pager
Concept: a terminal pager, like less for example, that interactively "folds" and "unfolds" the input file (as in emacs outline mode). Folded, a recursive directory listing might show only the ...
0
votes
3answers
102 views
Safe way of running an equivalent to rm -rf * [closed]
I have a task which contain a series of manual steps. One of the steps is to execute rm -rf *. Everything in the folder does need to be deleted but this seems a little dangerous for example. if the ...
0
votes
1answer
27 views
Find string and make it bold in output E-mail
i have below code which check status of some services on linux rhel 7 and send email (output is different service status). i want to make specific string called "up" and or "NOT up" in bold and with ...
2
votes
1answer
173 views
gnu parallel how to use with ffmpeg
I have folder that contains some mp4 files I want to extract images from each of them in parallel and save it as:
filename_number.bmp
where filename is the input filename
how to do that using ...
1
vote
1answer
42 views
How to include input file name in output file name in ffmpeg
I want to extract frames as images from video
and I want each image to be named
as InputFileName_number.bmp.
How can I do this?
I tried the following command:
ffmpeg -i clip.mp4 fr1/$filename%d.jpg ...
0
votes
1answer
46 views
Does the wc command strip the trailing line feed from txt files?
I'm currently building a replica of the wc command line call (in C). I have a file [tst.txt]
and the C code to read that file. The wc tst.txt command responds with the output: 2 6 20 tst....
0
votes
1answer
76 views
Make process not exit, when exiting from SSH terminal
I just run bitcoind in centOS server. I run the following command
nohup ./bitcoind > out & disown
Then I exit the SSH terminal, and the process is automatically closed. Is there any way to ...
0
votes
0answers
23 views
A way to see your location history within the command line?
Similar to git's reflog, I'm looking for a way to see the directories I have moved through. I have lost something and I'm not sure exactly what happened, and something like the reflog is exactly what ...
0
votes
0answers
25 views
How to list all services (daemons) on a Unix system that can be started by current user, but that will run as root?
How to list all services (daemons) on a Unix system that can be started by current user, but that will run as root?
I'm studying cyber security and plays with capture-the-flag machines to enhance my ...
0
votes
1answer
50 views
How do you disable XON/OFF flow control?
I issued a stty -ixon command which enables XON/XOFF flow control.
There is a stty -ixoff command but that enables the "sending of start/stop characters".
So once XON/XOFF flow control is enabled, ...
0
votes
2answers
52 views
Add three dot floating numbers in shell
I am trying to append 5.34.03 number to 5.34.04 by using the following command
$ awk '{print 5.34.03 + 0.0.1}'
5.340.030.1
Expected output
5.34.13
I tried with many methods, eg. let, but it didn't ...
0
votes
2answers
47 views
Deleted a user but forgot to delete home directory and user files
I have deleted a user using userdel command, but I forgot to delete user files. Now I want to delete those files, how can I find and delete them?
0
votes
2answers
36 views
How to subtract every adjacent line from the 2nd column and keep the first one
I am creating a file via this command:
awk '{print $2 " "$7" "$8}' REACTOME_EXTENSION_OF_TELOMERES.xls | awk '$8!="No" {print $1 " " $2}' | awk 'NR>1' | awk 'BEGIN { OFS=", "; print "Name" " " "...
0
votes
1answer
31 views
Recover comand is not working
I am trying to use recover command to recover my deleted file, however when I use it, process got aborted with below error:
recover: No valid standard devices found; are you a privileged user?
Please ...
1
vote
1answer
71 views
chcon: cannot access (file): No such file or directory
I'm taking a Linux course and I have no idea on how to get past this annoying error:
chcon: cannot access path: No such file or directory
But before that we had to define our virtual host
Perhaps ...
2
votes
3answers
147 views
Getting out of while loop on console
I ran a command:
while true ; do ..... ....... ; done
on the Linux console/terminal, and now this while loop is continuously running.
I have two questions here:
How to get out of this while loop?
...
-2
votes
3answers
40 views
How to obtain certain lines from several texts simultaneously?
Suppose I have 100 texts under the same dir, i.e., text1.txt, text2.txt,...,text100.txt. I want to extract certain lines(e.g., first 100 lines)from each text, and save the lines to another new 100 ...
-1
votes
3answers
48 views
How to calculate mean of each 3 columns in data frame?
I have a data frame like this:
> head(dat_sg2)
DwoC_2318_norm.1 DwoC_2318_norm.2 DwoC_2318_norm.3 DwoC_3395_norm.1 DwoC_3395_norm.2 DwoC_3395_norm.3 DwoC_6154_norm.1
...
0
votes
0answers
29 views
How can I edit sudoers file if I have lost permissions despite providing root password?
While working on ubuntu, I have edited sudoers file and allowed myself to run only mkdir, cd command. Now I am unable to execute, install any command. Even visudo is not working despite providing root ...
1
vote
1answer
29 views
Commands Not Found when Passed through SSH
System:
Red Hat Enterprise Linux Server release 7.6 (Maipo), 3.10.0-957.el7.x86_64
GOAL:
Collect configurations for data from multiple servers to validate they are the same.
What Works:
ssh $...
1
vote
1answer
63 views
dd: No space left on device
I was restoring a backup of my Raspberry Pi on a new micro SD card.
The original card was 16Gb and the destination card was 16Gb, too. However, during the transfer dd complained that there isn't any ...
0
votes
1answer
38 views
Output of df contradicts output of du?
When I run the df -h command while SSH'd into my SUSE Linux box I get the following output:
/dev/sdt1, with a capacity of 512G, is mounted on /usr/sap
However, if I cd to usr/sap/<HANA server ID&...
0
votes
1answer
53 views
How to use the bash shell with Python's in place of /bin/sh
I have commands to execute in the terminal but I want to execute them directly from my python script except that my script it launches the commands on /bin /sh and my terminal on bash:
just an ...
1
vote
1answer
98 views
“Forcing” a kernel panic from the terminal on Linux
I'm using Solus 4.0 (in a VM) and trying to make screenshots of "typical" kernel panic output ("BSOD"). The init system in Solus is systemd.
I tried the following commands in the terminal without ...
0
votes
1answer
33 views
Parsing “mdls” output
The following script takes a user input (path to a mounted macOS volume such as /Volumes/Macintosh\ HD/)
#!/bin/bash
# Author: Swasti Bhushan Deb
# macOS 10.13.3
# kMDItemWhereFroms.sh
read -e -p "...
2
votes
2answers
97 views
How to grep all lines from one file in specific column in multiple other files?
I have one file: combined.txt like this:
GO_GLUTAMINE_FAMILY_AMINO_ACID_METABOLIC_PROCESS
REACTOME_APC_CDC20_MEDIATED_DEGRADATION_OF_NEK2A
LEE_METASTASIS_AND_RNA_PROCESSING_UP
RB_DN.V1_UP
...
1
vote
1answer
30 views
Element comparison between subsequent lines, assigning a value for each null output
I have an output which looks like this:
ASCII file
I want to pick up the last element from the rows that contain the string "Fe\s2b". But the thing is each occurrence of "H\s\s1\s\s\s\s\s\s4861.33A" ...
0
votes
0answers
29 views
How to extract only XML message from log file having text and XML message both
Below are the sample output:
er : [com.rbsg.digital.platform.model.persistence.entity.EntityAddressDTO.individuals#263660]
2019-04-13 05:00:19.924 DEBUG LENDING_DIGITAL_CERT_STAFF_LBZ5_PROD_MM [http-...
1
vote
1answer
30 views
How to use asciinema offline?
How can I record and play asciinema screen recordings in a LAN without internet connection?
The tool uploads the recordings per default to the asciinema website but I want to keep it local and run ...
