[SOLVED] Change default shell from sh to bash (378.56_2)

[Joel Teixeira]

Hello all,

I'm trying to change the default shell from sh to bash and following this guide:

http://www.snbforums.com/threads/bash-history.16694/#post-1150

I created a 'profile.add' file on /jffs/config with this line:

[ -f /opt/bin/bash ] && exec /opt/bin/bash

But I still get "/bin/sh" on "echo $Shell".

 

[thelonelycoder]

A couple of checks for you:
- Try this to check for your active shell:

echo $0

- Did you install Entware and install bash?
If not use this code, as bash completion is no longer available:

opkg update && opkg upgrade
opkg install bash

- Did you check that your /tmp/etc/profile has these entries. If the are present all is OK.

[ -f /opt/etc/profile ] && . /opt/etc/profile
[ -f /jffs/configs/profile.add ] && . /jffs/configs/profile.add

 

[Joel Teixeira]

A couple of checks for you:
- Try this to check for your active shell:

echo $0

- Did you install Entware and install bash?
If not use this code, as bash completion is no longer available:

opkg update && opkg upgrade
opkg install bash

- Did you check that your /tmp/etc/profile has these entries. If the are present all is OK.

[ -f /opt/etc/profile ] && . /opt/etc/profile
[ -f /jffs/configs/profile.add ] && . /jffs/configs/profile.add

Hi thelonelycoder, thanks for your input.

RT-AC3200:~# echo $0
/opt/bin/bash

RT-AC3200:~# echo $SHELL
/bin/sh

For the first command, I got the /opt/bin/bash and I`m a bit confused now. I usually got this info from $SHELL variable and it shows /bin/sh. Should I assume the variable is wrong?


EDIT: Just including anwers:

Yes, installed entware and bash.
Yes, profile.add got this content right.

 

[thelonelycoder]

You are on a bash shell.
$SHELL gives the full path to your default shell.
$0 gives the name of your current shell.

 

[Joel Teixeira]

Didn't know that, thanks a lot thelonelycoder.

 

[sasa1978]

Ok:

Using username "sasa".

ASUSWRT-Merlin RT-AC87U_3.0.0.4 Mon Nov 2 15:00:06 UTC 2015

sasa@RT-AC87U:/tmp/home/root# echo $0
/opt/bin/bash

sasa@RT-AC87U:/tmp/home/root# mc

# echo $0
/bin/sh

Any idea?

 

[sasa1978]

SOLVED:

Add to file /opt/etc/profile:
export SHELL="/opt/bin/bash"

 

[Joel Teixeira]

SOLVED:

Add to file /opt/etc/profile:
export SHELL="/opt/bin/bash"

Thanks both of you, it's working as expected now. I still wondering why aliases won't work tho. If you have some light to shed on this topic would be more than welcome. Thanks.

Sent from my SM-N910C using Tapatalk

 

[sasa1978]

Use .bashrc script for aliases

 

[thelonelycoder]

Hey @sasa1978: The .bashrc file is written to /tmp/home/root and will not survive a reboot.

What I do is copy the file at every reboot with this line in jffs/scripts/services-start:

cp /tmp/mnt/sda1/bash/.bashrc /tmp/home/root/.bashrc

 

[Joel Teixeira]

Thanks so much guys, this information was very helpful.

 

[Sean Rhodes]

Still not getting this to work. If I type

source ~/.bashrc

then it works, but this doesnt

rhodess@Asus-Merlin:/tmp/home/root# ~/.bashrc
bash: /root/.bashrc: Permission denied

Any ideas?

 

[RMerlin]

chmod a+rx ~/.bashrc

 

[Sean Rhodes]

Thanks Merlin, I tried that, don’t get the error anymore but still doesn’t read .bashrc without putting source in front.
I was reading that sometimes bash does not read the file, so I was thinking I should put that in a startup script, but not sure which one I copy the .bashrc from my USB once it’s mounted, I assume that it would be OK to add a line in post-mount can you advise

 

[thelonelycoder]

Thanks Merlin, I tried that, don’t get the error anymore but still doesn’t read .bashrc without putting source in front.
I was reading that sometimes bash does not read the file, so I was thinking I should put that in a startup script, but not sure which one I copy the .bashrc from my USB once it’s mounted, I assume that it would be OK to add a line in post-mount can you advise

It works here, with these lines added to /opt/etc/profile

export SHELL="/opt/bin/bash"
source ~/.bashrc

Just make sure .bashrc is copied over from a persistent location to /home/root/ at every boot.

 

[Sean Rhodes]

It works here, with these lines added to /opt/etc/profile

export SHELL="/opt/bin/bash"
source ~/.bashrc

Just make sure .bashrc is copied over from a persistent location to /home/root/ at every boot.

That worked!

Thanks for the help

BTW, I found that adding the .bashrc command below

cp /tmp/mnt/data/.bashrc /tmp/home/root/.bashrc

to

jffs/scripts/services-start

didn't always work, but adding it to

/jffs/scripts/post-mount

always works

 

[jrmwvu04]

always works

In services-start, it’s possible that it’s running before /tmp/mnt/data has been mounted, whereas post-mount is called with (after) the mounting