How do I generate empty files, with names randomly taken from an input text file?

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I would like to generate 20 files (empty), each named using a 10 character string chosen randomly from a file "test.txt"(manually generate the file test.txt).

How to do this task?

edited Nov 21 at 14:18

abu_bua

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asked Nov 21 at 9:46

Zarvis

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5

We don't do your homework ... you have to figure that out your self. Or at least show what you have tried, and how it worked / failed.
– Soren A
Nov 21 at 9:52

3

We are not here to do your homework for you – what did you try and where do you have problems? Please edit to add further information.
– dessert
Nov 21 at 9:53

add a comment |

up vote
-2
down vote

favorite

I would like to generate 20 files (empty), each named using a 10 character string chosen randomly from a file "test.txt"(manually generate the file test.txt).

How to do this task?

edited Nov 21 at 14:18

abu_bua

3,05381023

asked Nov 21 at 9:46

Zarvis

New contributor

5

We don't do your homework ... you have to figure that out your self. Or at least show what you have tried, and how it worked / failed.
– Soren A
Nov 21 at 9:52

3

We are not here to do your homework for you – what did you try and where do you have problems? Please edit to add further information.
– dessert
Nov 21 at 9:53

add a comment |

up vote
-2
down vote

favorite

I would like to generate 20 files (empty), each named using a 10 character string chosen randomly from a file "test.txt"(manually generate the file test.txt).

How to do this task?

edited Nov 21 at 14:18

abu_bua

3,05381023

asked Nov 21 at 9:46

Zarvis

New contributor

I would like to generate 20 files (empty), each named using a 10 character string chosen randomly from a file "test.txt"(manually generate the file test.txt).

How to do this task?

bash

edited Nov 21 at 14:18

abu_bua

3,05381023

asked Nov 21 at 9:46

Zarvis

New contributor

edited Nov 21 at 14:18

abu_bua

3,05381023

asked Nov 21 at 9:46

Zarvis

New contributor

edited Nov 21 at 14:18

abu_bua

3,05381023

edited Nov 21 at 14:18

abu_bua

3,05381023

edited Nov 21 at 14:18

abu_bua

3,05381023

asked Nov 21 at 9:46

Zarvis

New contributor

asked Nov 21 at 9:46

Zarvis

asked Nov 21 at 9:46

Zarvis

New contributor

Zarvis is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

5

We don't do your homework ... you have to figure that out your self. Or at least show what you have tried, and how it worked / failed.
– Soren A
Nov 21 at 9:52

3

We are not here to do your homework for you – what did you try and where do you have problems? Please edit to add further information.
– dessert
Nov 21 at 9:53

add a comment |

5

We don't do your homework ... you have to figure that out your self. Or at least show what you have tried, and how it worked / failed.
– Soren A
Nov 21 at 9:52

3

We are not here to do your homework for you – what did you try and where do you have problems? Please edit to add further information.
– dessert
Nov 21 at 9:53

We don't do your homework ... you have to figure that out your self. Or at least show what you have tried, and how it worked / failed.
– Soren A
Nov 21 at 9:52

We are not here to do your homework for you – what did you try and where do you have problems? Please edit to add further information.
– dessert
Nov 21 at 9:53

add a comment |

2 Answers
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up vote
2
down vote

Assuming you already have the strings in test.txt, and they are all 10 characters wide, and they are one per line:

shuf -n 20 test.txt | xargs touch

shuf will shuffle the contents of test.txt and print the first 20 lines, then xargs will take that output and convert it to arguments for touch, which will create files using those arguments.

answered Nov 21 at 13:38

JohnDoea

New contributor

add a comment |

up vote
2
down vote

Using just the bash, without any external commands:

mapfile names < test.txt # save filenames in array

for ((i = 0; i < 20; i++)) # loop 20 times

do

    ind=$((RANDOM % ${#names[@]}))  # take random value less than length of array

    > "${names[$ind]}"      # redirection creates empty file

    unset names[$ind]       # remove used filename from array

    names=( "${names[@]}" ) # recreate array to remove gaps

done

answered Nov 21 at 14:59

Bash bros

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

up vote
2
down vote

Assuming you already have the strings in test.txt, and they are all 10 characters wide, and they are one per line:

shuf -n 20 test.txt | xargs touch

shuf will shuffle the contents of test.txt and print the first 20 lines, then xargs will take that output and convert it to arguments for touch, which will create files using those arguments.

answered Nov 21 at 13:38

JohnDoea

New contributor

add a comment |

up vote
2
down vote

Assuming you already have the strings in test.txt, and they are all 10 characters wide, and they are one per line:

shuf -n 20 test.txt | xargs touch

shuf will shuffle the contents of test.txt and print the first 20 lines, then xargs will take that output and convert it to arguments for touch, which will create files using those arguments.

answered Nov 21 at 13:38

JohnDoea

New contributor

add a comment |

up vote
2
down vote

Assuming you already have the strings in test.txt, and they are all 10 characters wide, and they are one per line:

shuf -n 20 test.txt | xargs touch

shuf will shuffle the contents of test.txt and print the first 20 lines, then xargs will take that output and convert it to arguments for touch, which will create files using those arguments.

answered Nov 21 at 13:38

JohnDoea

New contributor

Assuming you already have the strings in test.txt, and they are all 10 characters wide, and they are one per line:

shuf -n 20 test.txt | xargs touch

shuf will shuffle the contents of test.txt and print the first 20 lines, then xargs will take that output and convert it to arguments for touch, which will create files using those arguments.

answered Nov 21 at 13:38

JohnDoea

New contributor

answered Nov 21 at 13:38

JohnDoea

New contributor

answered Nov 21 at 13:38

JohnDoea

answered Nov 21 at 13:38

JohnDoea

New contributor

JohnDoea is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment |

up vote
2
down vote

Using just the bash, without any external commands:

mapfile names < test.txt # save filenames in array

for ((i = 0; i < 20; i++)) # loop 20 times

do

    ind=$((RANDOM % ${#names[@]}))  # take random value less than length of array

    > "${names[$ind]}"      # redirection creates empty file

    unset names[$ind]       # remove used filename from array

    names=( "${names[@]}" ) # recreate array to remove gaps

done

answered Nov 21 at 14:59

Bash bros

New contributor

add a comment |

up vote
2
down vote

Using just the bash, without any external commands:

mapfile names < test.txt # save filenames in array

for ((i = 0; i < 20; i++)) # loop 20 times

do

    ind=$((RANDOM % ${#names[@]}))  # take random value less than length of array

    > "${names[$ind]}"      # redirection creates empty file

    unset names[$ind]       # remove used filename from array

    names=( "${names[@]}" ) # recreate array to remove gaps

done

answered Nov 21 at 14:59

Bash bros

New contributor

add a comment |

up vote
2
down vote

Using just the bash, without any external commands:

mapfile names < test.txt # save filenames in array

for ((i = 0; i < 20; i++)) # loop 20 times

do

    ind=$((RANDOM % ${#names[@]}))  # take random value less than length of array

    > "${names[$ind]}"      # redirection creates empty file

    unset names[$ind]       # remove used filename from array

    names=( "${names[@]}" ) # recreate array to remove gaps

done

answered Nov 21 at 14:59

Bash bros

New contributor

Using just the bash, without any external commands:

mapfile names < test.txt # save filenames in array

for ((i = 0; i < 20; i++)) # loop 20 times

do

    ind=$((RANDOM % ${#names[@]}))  # take random value less than length of array

    > "${names[$ind]}"      # redirection creates empty file

    unset names[$ind]       # remove used filename from array

    names=( "${names[@]}" ) # recreate array to remove gaps

done

answered Nov 21 at 14:59

Bash bros

New contributor

answered Nov 21 at 14:59

Bash bros

New contributor

answered Nov 21 at 14:59

Bash bros

answered Nov 21 at 14:59

Bash bros

New contributor

Bash bros is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

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