macos - Mac终端:尝试添加到/etc/shells

Question

这个作品

$ cat /etc/shells
# List of acceptable shells for chpass(1).
# Ftpd will not allow users to connect who are not using
# one of these shells.

/bin/bash
/bin/csh
/bin/ksh
/bin/sh
/bin/tcsh
/bin/zsh

但这不是:

sudo -s 'echo /usr/local/bin/zsh >> /etc/shells'
/bin/bash: echo /usr/local/bin/zsh >> /etc/shells: No such file or directory

Answer 1

sudo将字符串作为完整命令。您应该使用 shell 程序来解释您的命令，如下所示:

sudo sh -c 'echo /usr/local/bin/zsh >> /etc/shells'

这将以root特权执行 sh，并且 sh将字符串解释为包含 >>作为输出重定向的shell命令。