All Questions
4,162 questions
-2
votes
0
answers
27
views
Creating in Linux files in GB or MB range by various size by read a file
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 ...
- 531
0
votes
1
answer
103
views
How to compare output of a program with a reference value in a shell script?
I have my own implementation of a Redis server which I'd like to test through a shell script.
The general idea is to feed it with some commands through nc, and since nc prints the output of my program ...
- 111
4
votes
1
answer
162
views
Run in background avoiding any job control message from the shell [duplicate]
Lets define a shell function (here the shell is Bash) and test it
$ s () { xterm -e sleep 5 & }
$ s
[1] 307926
$
[1]+ Done xterm -e sleep 5
$
With my specific meaning of ...
- 1,336
0
votes
2
answers
97
views
How to redirect output from a program that waits for input
Following this post I created my own version of the script, with the difference that user and password are forwarded from the environment variables:
#!/bin/zsh
pamtester login $user authenticate <&...
- 101
3
votes
1
answer
151
views
Bash redirections - handling several filenames specially (man pages)
Please confirm/correct me. I've found related Duplication of file descriptors in redirection but that does not answer my specific question.
From the The GNU Bash Reference Manual, section 3.6 ...
- 1,353
0
votes
0
answers
46
views
Shell script not behaving as expected expanding variable as command [duplicate]
I am trying to script a job which interacts with mysql. I am using a variable to store a long command line. But when run via a script this does not behave as expected. I can reproduce the issue as ...
- 6,225
0
votes
1
answer
42
views
What is (if any) the file descriptor of /dev/tty?
The urgent issue to read keyboard input in the pipeline is solved by the answer in https://stackoverflow.com/questions/15230289/read-keyboard-input-within-a-pipelined-read-loop:
mycommand-outputpiped |...
- 1,353
0
votes
1
answer
62
views
Why is the logic handled differently in rsync '--delete src/*', '--delete src/' and '--delete src/.'
I want to copy and synchronize directories using rsync with --delete or --delete-excluded in a bash script or shell on a Debian system.
The directory was not synchronized at first, meaning the deleted ...
- 6,329
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
0
votes
2
answers
91
views
Bash script, execute while command isnt outputting value
I'm trying to write a bash script (very new to writing them btw) on a Linux system, and I basically want it to execute a command every say 5 seconds while another command isn't outputting a value.
So ...
- 3
8
votes
1
answer
237
views
bash or ksh 'vi' mode - How to jump to end of history (most recent command)?
I am a long time ksh user, and use bash under duress - both in 'vi' editing mode.
One thing that has always niggled - after searching back through history for a command (.e.g <Esc>/needle), how ...
- 308
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 ...
- 531
7
votes
2
answers
1k
views
Having trouble with #!/bin/sh -h as the first line in a bash script: /bin/sh: 0: Illegal option -h
I have two systems, the file is the same. It works in openSuse, but having trouble in Ubuntu. The top of the script says: #!/bin/sh -h
I updated bash to match on both systems to match what is on ...
- 71
0
votes
2
answers
61
views
Kill current bash shell and start a new one with some command
is it possible to kill/exit the current bash shell and start a new one with some command?
Something like
kill -9 $PPID && bash -c echo 'I started new!'
which does not work obviously.
- 101
0
votes
1
answer
51
views
Why is bash expanding `[--x]` to `f` only when I’m in my home directory? [duplicate]
I'm observing a behavior in bash that only happens in my home folder. I haven't been able to reproduce it on any other machine or in any other folder.
$ echo --one [--two] --three
--one f --three
$ # ...
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