In the couple of months I've been using Ubuntu at home, I've discovered I need to use the "sudo" command almost daily for administrative changes and systemwide, non-user-specific tasks and so on. I've already set up zsh as my user shell, but the system default shell is bash, and whenever I do a "sudo" I'm wrenched out of my familiar customized zsh environment into a raw, minimally-config'd bash. Accordingly, I'd like to make zsh the system shell as well as having it be my user shell. (I'm the only user on the system.) I already have, in /etc/zsh/, a .zprofile, .zshenv and .zshrc, copied from my homedir. (Obviously some necessary tweaks & changes will have to be made in them.) My question is, (a) should those files be: /etc/.zprofile, etc/.zshenv and /etc/.zshrc, or is having them in an /etc/zsh/ subdir ok? and (b) (my main question), what exactly is the instruction-command(s) I'd use to tell the system to run zsh instead of bash as the system shell, and where would I need to put it? also (c), is there any reason I'd need, for this, to put any zsh config files in the /root directory? I had one there briefly and just noticed that I still have a .zcompdump file there. (Perhaps zsh configs are necessary there to start a root shell. I'm a bit fuzzy on this stuff -- for years I've only used zsh via ssh on other systems, and only as a user.) I think I want zsh to be the operative shell in all situations (unless that would for some reason be imprudent), like on the infrequent occasion when I also do a "sudo su -" (i.e., start a root shell). Though just now I saw this: "To start a root shell, but keep the current shell's environment, use: sudo -s (similar to sudo su)" (where "sudo i" give you root's environment configuration.) But "sudo -s", for me, returns "sudo: shell: command not found" Thanks for any clarity on these issues.
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