Questions tagged [ash]
The Almquist shell is a variant of the Bourne shell. Its most famous forks ares busybox ash and dash.
64 questions
0
votes
1
answer
452
views
How can I correctly configure Docker Rootless to run as a service on Alpine Linux
I need to run Docker Rootless on an Alpine Linux 3.19.0 instance. I have followed the instructions of this blogpost in order to create a basic setup with an user named dev. I wish to configure it as ...
0
votes
1
answer
298
views
How to execute history command by number in Alpine Linux (busybox, ash)?
Is it possible to execute a history command by number with !###, similar to bash/zsh? Alpine's ash shell does not interpret this:
$ history
1441 date
1442 history
$ !1141
-sh: !1141: not found
- 161
-1
votes
2
answers
280
views
Where is the prompt configured in ash's login shell?
I can login on an alpine based docker container by either a non-login or non-login shell, i.e. ash vs ash -l.
$ docker run -it --rm alpine /bin/ash
/ #
Now when I use the login shell, I see a weird ...
- 16.7k
0
votes
3
answers
563
views
How to make 'adb shell' to read /etc/profile or other configuration files?
I am working on an embedded Linux system (kernel-5.10.24), and it uses ash from busybox as /bin/sh. The system support login from serial console and adb shell from PC.
Now I found the shell started ...
- 651
1
vote
0
answers
1k
views
Merge set x (xtrace) and v (verbose)
How to merge set -x and set -v in ash? (or set -v with a prefix)
In other words, echo back command upon running.
The DEBUG signal does not exist in ash: DEBUG: invalid signal specification.
set -x
$ ...
- 460
2
votes
1
answer
878
views
Stop stdin while command is running
How to stop stdin while command is running in ash (not bash)?
For example:
sleep 10
type echo hello while sleep is still running
observe hello is in stdout after sleep finishes
Desired:
sleep 10
...
- 460
1
vote
3
answers
8k
views
How to use sh script to send hex data to /dev/ttyUSB0?
I'm working with a paired down embedded Linux installation that does not support bash, only sh across a ssh terminal. I need to send hex data to a connected USB device /dev/ttyUSB0. I'm able to do ...
- 285
0
votes
1
answer
2k
views
alias in ash - limitation, syntax issue?
I'm running OpenWRT in a NAS (WD-MBL) and putting together a set of aliases to make maintenance easier via the command line.
These work as expected:
alias shutdown='sync && wait && ...
- 31
0
votes
1
answer
350
views
ash - parse a config file line after line
My config file looks as follows:
ver 3
file test1.conf ~/etc
file test2.conf ~/etc/conf
script tst.sh
I'd like my script to iterate through all lines prefixed with "file", extract filename ...
- 35
16
votes
2
answers
32k
views
What is the difference between `ash` and `sh` shell on Linux?
I am new to a lot of tools on Linux. A quick search did not help, I only got more about bash or sh, and searching for it somehow leans towards bash in the search results. There are quite a few ...
- 607
1
vote
2
answers
2k
views
ssh, start a specific shell (ash), and source your environment on the remote machine
This is a kind of follow-up question to this question: ssh, start a specific shell, and run a command on the remote machine?, except more-specifically regarding ash, and focused on the fact that ...
- 3,032
0
votes
3
answers
113
views
find/detect file name goups
On fs i have files like:
PREFIX_GROUPNAME_OTHERNAMES[.txt|.*]
eg:
A_ABC_A.txt
A_ABC_B.txt
A_ABC_C.txt
A_XYZ_A.txt
A_XYZ_B.txt
A_XYZ_C.txt
For some futher tasks i want to get the group names.
$# ...
- 13
0
votes
1
answer
535
views
How to generate a string of concatenated key/value pairs in a script?
I need to build a string of --build-arg parameter using some key/value pairs (build.args file) in a busybox shell:
script.sh
#!/bin/sh
one=$1
two=$2
shift
while IFS= read -r line; do
set "$@&...
- 1,649
0
votes
0
answers
17
views
ASH scripting quotes in backticks works with echo but not with actual execution [duplicate]
I am creating a script for my router (running busybox).
In my script I generate a command in a variable like nvram set option='value with spaces' but when it is executed it complains that arguments ...
- 101
5
votes
3
answers
1k
views
What one should check when re writing bash conditions for sh or ash?
Sometime, it is not possible to have the luxury of bash on a system, but conditions are easier to make on bash compared to sh or ash, what one should verify to ensure condition won't break with ...
- 1,054