All Questions
493 questions
-1
votes
1
answer
80
views
Creating in Linux files in GB or MB range by various size by read a file [closed]
In Linux with Bash, there is the File numbers_in_one_line.
In this file there is only one line with several numbers, all separated by spaces.
These numbers are the value in bytes for creating files ...
- 543
0
votes
1
answer
86
views
How to create splittet random files and join them with dmsetup
In Linux in Bash, there is a script, a part of the script is this
while true ; do
echo
awk -v x=$(<"$TEMPDIR"size_container_in_byte) -v n=$(<"$TEMPDIR"parts) 'BEGIN{...
- 543
-7
votes
2
answers
93
views
How can I pick random items from a list, but some more often than others, in a Bash config file? [closed]
In Linux, using Bash, I have two scripts:
script.sh is the main script, and
script_config.sh is the configuration for script.sh.
In script.sh, I do source script_config.sh to load all the config ...
- 543
1
vote
1
answer
66
views
How can a bash script determine how it was started? [duplicate]
I am running various scripts on Debian 12.X currently with the following bash:
GNU bash, version 5.2.15(1)-release (x86_64-pc-linux-gnu)
I have the following methods/options to execute the script.
...
- 6,329
-3
votes
1
answer
50
views
Rename files, remove the first four signs [duplicate]
There are many files in this format:
IMG_20240717_191421.jpg
IMG_20240620_165358_BURST001_COVER.jpg
IMG_20240624_173513_2.jpg
how can they renamed in Linux in Bash to:
20240717_191421.jpg
...
- 543
0
votes
5
answers
128
views
Move/mark files and the associated-part too
There is a folder with many files in it:
112.mkv
123.md5
123.mkv
221.mkv
467.mkv
aa1.mkv
abc.md5
abc.mkv
bbc.mkv
dde.md5
dde.mkv
ggh.mkv
....
xxy.md5
xxy.mkv
xxz.mkv
How can I move .md5 files and the ...
- 543
2
votes
1
answer
167
views
select in a script
In Linux in Bash in a Script i use this:
#!/bin/bash
while true; do
while true; do
read -r -p 'enter number [4-999]: ' num
if [[ $num =~ ^([4-9]|[1-9][0-9]{1,2})$ ]]; then
...
- 543
-4
votes
2
answers
110
views
How to write in Linux in Bash in shellscript a part that can do something like this
How to write in Linux in Bash in shellscript a part that can do something like this
enter a number
must be in a range from 4-999
if not, ask again to enter
enterednumber * 5 * randomnumber [1-9] (...
- 543
0
votes
2
answers
72
views
How to print the processed argument after each command invocation with xargs
i run this command:
ls -1 | xargs -I% -n1 -P8 myprogramm -s1 -r5 -q -o %.dat %
it works with 8 runs at one time, the -q switch in myprogramm for quit, that is ok so.
but i will add something like ...
- 543
4
votes
2
answers
545
views
how to check if the path from where the script is started stored on a hdd or ssd drive?
how to check if the path from where the script is started stored on a hdd or ssd drive?
i have read that cat /sys/block/sda/queue/rotational show 0 for ssd and 1 for hdd.
if [ "$(</sys/block/...
- 543
1
vote
1
answer
110
views
add a randomize option in a bash script
in a bash script i do run this:
seq 1 $(<howmany.txt) | xargs -I% -n1 -P$(<parallel.txt) mycommand --infile file% --option A --outfile file%.new
it works.
the values in howmany.txt and parallel....
- 543
0
votes
1
answer
64
views
How to exit a shell if the subshell exit with an error [closed]
there is a script, 1.sh. 1.sh starts 1a.sh and then 1b.sh.
But how to exit all scripts, how to exit 1.sh and how to not start 1b.sh if 1a.sh breaks with an error?
- 543
0
votes
1
answer
121
views
Difference between -v, -z and -n while comparing variables in a shell script
There are the following ways to check if a variable is available or not in a linux/unix shell script
[ ! -z "${MYVARIABLE}" ]
OR
[ -n "${MYVARIABLE}" ]
OR
[[ ! -v MYVARIABLE ]]
...
- 80
0
votes
5
answers
228
views
Convert Date Format %Y%m%d%H%M%S to unix epoch format
I am trying all the methods but I get this error:
I want to convert this format to epoch -->
date "+%Y%m%d%H%M%S"
example --> 20240913235959
I also tried other formats such as:
date &...
3
votes
1
answer
525
views
Strange variable scope behavior when calling function recursivly
EDIT: sorry. this is my first question here.
Here is a minimal working example
#!/bin/bash
#
count=0
function something() {
if test -f "$1"; then
# is a file
((count++))
...
- 43