File permission change

LXC
1

How to change the file permission of the file created by the lxc container script

2

Welcome!

If there is a file /home/ubuntu/myfile.txt in the container mycontainer and you want to change the permissions from the host, you would run from the host:

incus exec mycontainer -- chmod 644 /home/ubuntu/myfile.txt
3

Thanks for your replay simos
the file is created by the script run by the container with the permission only -rw------ i need to change it to -rw-r----- is it possible use
incus exec mycontainer – chmod 644 /home/ubuntu/myfile.txt

in script to change the permission?

4

If the permissions were rw- --- --- and you want to make them rw- r-- ---, then you can either run the following to add read access for the group (second triplet).

 incus exec mycontainer -- chmod g+r /home/ubuntu/myfile.txt

or set directly to rw- r-- ---,

 incus exec mycontainer -- chmod 640 /home/ubuntu/myfile.txt

Alternatively, you can modify your script and set the umask according to the instructions. By setting a value to umask, you can control the default permissions when a new file is created.

$ umask
0002
$ touch myfile.txt
$ ls -l myfile.txt 
-rw-rw-r-- 1 user user 0 Μαρ  30 21:39 myfile.txt
$ rm myfile.txt 
$ umask 0026 
$ touch myfile.txt
$ ls -l myfile.txt 
-rw-r----- 1 user user 0 Μαρ  30 21:39 myfile.txt
$