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Questions - bash

Strange behavior with /bin/ca?

My version of bash: GNU bash, version 5.0.17(1)-release (x86_64-pc-linux-gnu) I'm currently on Ubuntu 18.04. Reproduction: env -i /bin/bash /bin/ca? I'm just now learning bash and I'm curious why th...
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alex

linux

bash

Votes: 0

Answers: 0

Disable Flags From Being Used in Bash Script Input?

I am currently making a Bash Script to take the users' input and pass it through Grep. I don't have much, but the requirements for this script do not require for much either. One requirement for the s...
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Bill Joe

linux

bash

security

input

grep

Votes: 0

Answers: 1

Latest Answer

Easy fix can be done here: #!/bin/bash read -r -p "Input string: " input [ -z "$input" ] || grep -- "$input" ../dict.txt The double dash here acts as a flag without a va...
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Bill Joe

Writing a bash script to merge multiple .csv files into one and keeping the same header

I am trying to write a script to merge multiple .csv files(could be an empty file as well) into one .csv file. One way I found was using cat. cat *.csv > outputFile.csv This is working just fine. ...
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tsunade

bash

csv

awk

sed

Votes: 0

Answers: 1

Latest Answer

I would use awk: awk ' FNR == 1 && NR != 1 {next} # skip all headers except the first one /^,*$/ {next} # skip all empty CSV rows !seen[$0]++ # print un...
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Fravadona

how to increment all digits in string(Bash Script)

My code #!/bin/bash echo -n "Zadaj vetu: " read str echo $str | awk '{ for (i=NF; i>1; i--) printf("%s ",$i); print $1; }' | tr ' ' '\n' | tr -d '#' | tr -d '=' | tr -d '-' I ...
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Wuju Style

bash

awk

Votes: 0

Answers: 2

Latest Answer

you can use the tr command for this. echo "$str" | tr '0-9' '1-90' | tr -d '#=' Each character in the first argument is mapped to the corresponding character in the second argument. And it ...
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Barmar

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