Questions tagged [command-line]
The command-line is the interactive interface to your shell.
0
votes
0answers
23 views
how does the copy cp command differentiate between the ESP and root partition?
the boot directory exist on both the ESP(sda1) and root(sda5) partition.
when i use this sample command to copy vmlinuz and initrd files:
sudo cp -a initrd.img-4.15.0-43-generic /boot
i was able to ...
0
votes
1answer
37 views
Calculate difference in negative floating numbers with bc
I want to calculate the difference between two negative floating numbers and subsequently check if the result is below a certain threshold. The numbers are stored in the file.dat, since this ...
0
votes
2answers
47 views
Extract and rearrange from file
I have file which I want to extract and rearrange certain data , Old file contains a raw data this file is Input
reference:cve,2017-8962
sid:45885
reference:cve,2016-10033
reference:cve,2016-10034
...
0
votes
3answers
30 views
Using xargs command
Can i use ls - t | xargs > output.txt by being outside the directory for example
I want to access
/home/123/script/final directory and then perform the above function. Something like this:
ls - ...
1
vote
2answers
43 views
Copy a folder overwriting ONLY smaller files in destination
I have tons of PDFs in multiple sub-folders in /home/user/original that I have compressed using ghostscript pdfwrite in /home/user/compressed.
ghostscript has done a great job at compressing about 90% ...
0
votes
0answers
19 views
mate-terminal - is it possible to toggle menu/tab/scroll bars when switching between full screen and window mode?
I use MATE 1.16.2 on Debian (Stretch) 9.0.0 and I've been customizing my command line of choice: mate-terminal (version 1.16.3).
I've made a distinctive $PS1 prompt and further personalized my ....
2
votes
0answers
17 views
mbuffer how does the -T Param work
I'm currently trying to make a tar backup to a tape with mbuffer acting as a buffer between e.g:
tar --acls -c /var/test | mbuffer -m 8G -P 100% -R 100M | dd of=/dev/nst0 bs=256k
But the buffer is ...
1
vote
1answer
135 views
Bash prompt getting garbled when I browse history?
I have MacOS and .bash_profile content:
export PS1="\[\e[0;31m$\]\[\e[m\] \[\e[0;32m\w\e[m\] : \]"
as a result I have pwd printed in terminal like this:
but when I press up and down arrows to use ...
-1
votes
0answers
17 views
Makefile: Linters and Formatters [on hold]
Are there any CLI Makefile Linters and Formatters? Also, does it support the GNU dialect?
8
votes
3answers
939 views
Why can't I see the “wget” job when I execute it in the background?
I use wget command in the background like this
wget -bq
and it prints
Continuing in background, pid 31754.
But when I type the command jobs, I don't see my job(although the downloading is not ...
3
votes
1answer
61 views
Commands Differences Using Quotations (Find)
I was reading the man page of find and I found myself confused with the following commands. What is the difference between one and its corresponding one.
What is the difference between the following ...
0
votes
1answer
28 views
bash: ucbps: command not found
How do I solve this?
bash: ucbps: command not found
[cbwlskbd@cbl06677app08 ~]$
Where to include the path for this?
and how the paths are included
-1
votes
1answer
68 views
How to send ^D / EOT character to stdin of a shell process?
Suppose I have two shells open, one with PID 1234 and the other - 5678.
I can clear the screen and reset of the other shell via echo $'\033c' > /proc/1234/fd/0 as if reset was typed on the prompt ...
1
vote
0answers
19 views
Command to list all reserved words [duplicate]
Is there a command to list all reserved words?
I'm aware of resources such as the GNU reserved word index, but what I'm looking for is a command that gives me this information for my shell on the ...
0
votes
0answers
23 views
Zsh: slow when run bash shell script [on hold]
I have a script that written completely with bash compatible in mind, that used with dmenu to handle a task.
I use zsh as default shell, in that script I have shebang like #!/usr/bin/env bash, dmenu ...
11
votes
2answers
905 views
Use chmod command selectively
I want to set 755 permission on all files and sub-directories under a specific directory, but I want to execute chmod 755 only for those components which does not have 755 permission.
find /...
1
vote
1answer
23 views
Remove Package and dependencies installed along with it
I noticed while removing httpd package that dependencies installed all not removed along with that
# yum remove httpd
How can i remove a package and dependencies which were installed along with that ...
1
vote
0answers
22 views
Script get in process multiple times
I have a script that starts, kills or restarts several java programs. However, when I execute it, it ends up running multiple multiple times in the background.
This is my script:
#!/bin/bash
export ...
0
votes
0answers
11 views
Chrome gets closed after few seconds in ubuntu 14.04
I want to update my chrome browser but as soon as i updated it using command
apt-get update
wget chrome-package
apt-get install google-chrome
it get install but it is getting quite every ...
9
votes
1answer
334 views
get three-letter day name from date command
date +%b
gives me the three-letter abbreviation of the current month name (I found that out online, it's not in my man date nor can I find the answer to this question in my man date).
How do I get ...
2
votes
2answers
44 views
compressing and decompressing dd image - zstd instead of gzip
Earlier I was using fsarchiver to create compressed partition image. Due to some weird behavior I am choosing to replace it with dd.
However, I like how fsarchiver compressed with zstd.
So, I ...
0
votes
1answer
16 views
fsarchiver taking ages to backup and restore
Using Linux Mint 19.1 bootable USB
Ext4 filesystem
Processor 8600k
Ram 16gb
By default fsarchiver uses zstd compression
Earlier when I used the following two commands, each command individually took ...
1
vote
1answer
62 views
Translate BATCH to Bash
Hello Unix & Linux Community,
I am here to ask how I can translate a Windows Batch File (.bat), into a Linux Bash File (.sh), because I want to allow a program I made, into Linux. But I have no ...
0
votes
0answers
6 views
Can run the command when specify the path, but cannot run it by name although PATH points to it [duplicate]
I have the following setup:
$ which pip3.7
/py36env/bin/pip3.7
$ sudo pip3.7 list
sudo: pip3.7: command not found
$ sudo /py36env/bin/pip3.7 list
Package Version
------------------...
0
votes
2answers
24 views
How to print SSID only?
While I working on a script I need to print available SSID only.
I tried this:
sudo iwlist wlp2s0 scan | grep ESSID
I got output like this:
ESSID:"CoreFragment_5G"
...
0
votes
1answer
20 views
Tmux: automatically run commands in the event of creating new pane or window
I have fixed a, b, c sessions - their name won't be changed and already auto created when I start tmux.
I'd like to auto run a command in the event of creating new pane or new window in a session ...
1
vote
3answers
52 views
Shell: only double quote on test -n/-z? [duplicate]
In case of test -e for example:
VAR="<this is a file path: /path/to/file/or/dir"
test -e $VAR && do_something || do_anotherthing
Question: Should I use "$VAR" here?, here I don't like ...
0
votes
1answer
34 views
Pipe file containing list of images to sxiv and reflect changes immediadly
Suppose I have a file images.txt which contains for example
image1.jpg
image2.jpg
image3.jpg
Then I pipe the images.txt to sxiv and I want that the thumbnail view reflects the changes immediately. ...
2
votes
2answers
248 views
Bash: Timer in while loop
I have a while loop in my script which waits for the connection get online and then continues.
#!/bin/sh
while ! ping -c1 $1 &>/dev/null
do echo "Ping Fail - `date`"
done
echo "Host ...
4
votes
1answer
237 views
Is it possible to check if a specific process is sleeping or running?
I've created the following script on Ubuntu that can pause and start a specific process:
#!/bin/bash
loopProcess () {
COUNTER=0
while [ true ]; do
echo $COUNTER
sleep 1
let ...
1
vote
2answers
49 views
How to start a new column after every nth row?
I have a file (comma separated) on a Linux system with 3 columns. I want to start new column after every 4th row.
Input:
col1,col2,col3
1,disease1,high
1,disease2,low
1,disease3,high
col1,col2,...
0
votes
0answers
24 views
Creating Plain Text MAN Pages: Removing overstrike characters [duplicate]
I want to create plain text files of certain man pages such as the "ls" command.
Simply performing a man ls > ls.txt, and then running file ls.txt will inform me that this is full of 'ASCII text, ...
0
votes
0answers
11 views
Opening multiple console tabs executing a different task in each from a shell script?
For a script performing multiple actions I want to execute certain actions in newly created console tabs.
The current script is like this
qdbus $KONSOLE_DBUS_SERVICE $KONSOLE_DBUS_WINDOW newSession ...
0
votes
1answer
24 views
Pass space separated arguments stored in variable to command
I've hijacked a pretty neat backup script from the internet but somewhere along the lines there is something like this going on
DIRS="/home/ /var/www/html /etc"
tar -czf /backup/file.tar.gz "${DIRS}"...
4
votes
2answers
105 views
Linux Mint. How to set the terminal password to be invisible?
I change to Linux Mint about 2 days ago. And I feel uncomfortable when I put the 'sudo password', because I used to see nothing and now I saw "*****".
0
votes
0answers
18 views
How do you open KVM or Whonix Gateway/Workstation in debian 9 command line?
I can start Whonix-Gateway using this command:
virsh start Whonix-Gateway
However, I cannot open it from the command line. How would I do that without using GUI?
Further how does one open the KVM ...
0
votes
1answer
26 views
Secondary password file creation and reset
Is there any way to reset all passwords previously created when the secondary password file is enabled for the first time to ensure higher-level protection ?.
1
vote
1answer
45 views
Printf - print repeating minus symbols [duplicate]
how can I use printf to print a row of minus symbols?
when I try: printf "-----------\\n"
I get:
bash: printf: - : invalid option
printf: usage: printf [-v var] format [arguments]
when I try: ...
1
vote
2answers
51 views
How to get the type of a certain dconf key?
How do I get the type of a dconf/gsettings key via command line ?
I know I can visually inspect keys types and values via the gui tool dconf-editor e.g. the key num-workspaces under the schema org....
0
votes
0answers
53 views
Debian 9: synaptic package manager won't launch from command line
Every time I enter this line:
sudo pkexec synaptic
The synaptic package manager opens, but always followed by this error message:
E: Could not open file - open (2: No such file or directory)
E: ...
3
votes
3answers
219 views
Union commands after the || (OR) operator
When I write the code the way below, I am able to run several commands after the else statement:
if [ "$?" -eq 0 ]
then
echo "OK"
else
echo "NOK"
exit 1
...
0
votes
0answers
18 views
Silence when capturing microphone with either arecord or sax
I am trying to run the following commands
sox -t alsa default output.wav
and
arecord output.wav
and
arecord -f dat -r 60000 -D hw:0,0 -d 5 output.wav
In all cases I am getting silent WAV. I ...
-1
votes
0answers
32 views
Inactive session timeout for GUI and Terminal [duplicate]
How inactivity timeout for GUI session is set for 15 min ?.
Once a user's session is locked or terminated, the product must force the user to re-authenticate before continuing his or her session.
...
0
votes
3answers
60 views
Changing CSV Column Layout
Does anyone have a good solution for taking a CSV file and adjusting the column layout?
So for example, I have a file with headers + data:
foo,bar,baz
1,2,3
But I want to change the column layout ...
0
votes
0answers
25 views
Quickly verify a large number of domains via whois
If I do
time whois google.com
it takes about a second to come back with a response to if a domain is registered or not.
If I do (a non-existant domain)
time whois fslafdjlsadjflsjdf.com
It comes ...
1
vote
1answer
27 views
Zsh: remove # - comment when pasting to terminal?
I use clipmenu to choose something to paste into terminal that running zsh as shell.
Problem is that zsh will echo error when for example I paste a shell function that contains some # for comments ...
3
votes
3answers
357 views
Does AWK have similar ability as SED to find line ranges based on text in line rather than line number?
Resolution: the files were saved with CR rather than LF line breaks.
Mosvy pointed this out, but only posted as a comment, rather than an answer, so I am unable to officially thank him for helping me ...
1
vote
2answers
58 views
Find all empty directories AND directories with a single type of file
I'm trying to write a bash script that delete all empty directories as well as any directory that only container the .DS_Store file that Mac generates. I can do the former pretty easily with find -...
6
votes
3answers
801 views
How can I output a command to a file, without getting a blank file on error?
I'm trying to run a command, write that to a file, and then I'm using that file for something else.
The gist of what I need is:
myAPICommand.exe parameters > myFile.txt
The problem is that ...
9
votes
1answer
584 views
Redirecting stdout from two programs
I'm running a memory check tool (prog1) on a C++ code (prog2), both of which give me a huge and detailed output. In order to chase down some bugs I need to save this output to a file.
I tried ...
