帮我执行个 Linux 命令，看看兼容性

RETURN VALUE
Upon successful completion, the return value is the return value of PROGRAM. If the
calling process is not authorized or an authorization could not be obtained through
authentication or an error occured, pkexec exits with a return value of 127. If the
authorization could not be obtained because the user dismissed the authentication
dialog, pkexec exits with a return value of 126.

ubuntu22.04
需要输入密码运行这个命令，运行后得到输出
x
0

Ubuntu 22.04.2 LTS on Windows 10 x86_64

****@LAPTOP-Fan:~$ sudo pkexec echo x; echo $?;
[sudo] password for ****:
x
0

我遇到了跟这个问题完全一致的现象：

https://askubuntu.com/questions/799669/etc-sudoers-file-corrupted-and-i-cant-run-pkexec-visudo-over-ssh

在单会话 SSH 中 auth 失败。
但 systemctl 这样的提权命令又是能成功通过验证的


sudo pkexec 正常

Error executing command as another user: Request dismissed
126
Ubuntu 23.04

➜ ~ uname -a
Linux vultr 5.15.0-58-generic #64-Ubuntu SMP Thu Jan 5 11:43:13 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
➜ ~ cat /etc/issue
Ubuntu 22.04.2 LTS \n \l

➜ ~ pkexec echo x; echo $?;
x
0
➜ ~

admin 账户 sudo 前缀
x
0

Linux itis-bli-20476 5.19.0-43-generic #44~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon May 22 13:39:36 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

```bash
$ pkexec echo x; echo $?;
==== AUTHENTICATING FOR org.freedesktop.policykit.exec ====
Authentication is needed to run `/usr/bin/echo' as the super user
Authenticating as: vrqq
Password:
polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
==== AUTHENTICATION FAILED ====
Error executing command as another user: Not authorized

This incident has been reported.
127

$ sudo pkexec echo x; echo $?;
x
0

$ gnome-shell --version
GNOME Shell 40.10
```

Red Hat Enterprise Linux release 9.2 (Plow)
Linux rhedt 5.14.0-284.18.1.el9_2.x86_64

❯ pkexec echo x; echo $?;
Error executing command as another user: Request dismissed
126

❯ pkexec echo x; echo $?;
x
0

❯ cat /etc/redhat-release
Fedora release 38 (Thirty Eight)

支持楼主开发桌面 app.

可以 ps -ef 检查有没有 polkit 进程来接收请求, 没有就返回 127, 有就是 0.

不同桌面环境进程名不一样, xfce 和 i3 桌面环境是 /usr/lib/xfce-polkit/xfce-polkit

https://wiki.archlinux.org/title/Polkit

lin@x:~$ pkexec echo x; echo $?;
x
0
lin@x:~$ neofetch
##### lin@x
####### -----
##O#O## OS:ubuntu 18.04 x86_64
####### Host: 2325GB6 ThinkPad X230
########### Kernel: 6.1.0-20230601
############# Uptime: 1 day, 5 hours, 16 mins
############### Packages: 2175
################ Shell: bash 4.4.20
################# Resolution: 1920x1080
##################### DE: Unity:Unity7:ubuntu
##################### WM: Compiz
################# WM Theme: Adwaita
Theme: Ambiance [GTK2/3]
Icons: Ubuntu-mono-dark [GTK2/3]
Terminal: gnome-terminal
CPU: Intel i7-3615QE (8) @ 3.300GHz
GPU: Intel HD Graphics 4000
Memory: 2472MiB / 15576MiB

root@debian12:~# pkexec echo x; echo $?;
x
0

[sunnysab@archlinux ~]$ pkexec echo x; echo $?;
x
0

执行前弹出了密码输入框。

[root@VM-4-10-centos ~]# pkexec echo x; echo $?;
x
0
[root@VM-4-10-centos ~]# uname -a
Linux VM-4-10-centos 3.10.0-1160.45.1.el7.x86_64 #1 SMP Wed Oct 13 17:20:51 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
[root@VM-4-10-centos ~]#

ubuntu23.04
Ubuntu@ubuntu:~$ pkexec echo x; echo $?;
x
0

Deepin 20.9

```bash
# f @ f-PC in ~ [9:29:17]
$ pkexec echo x; echo $?;
x
0
```

archlinux, 桌面是 vnc 启动的 xfce ，需要输入 root 密码
[test@legion ~]$ pkexec echo x; echo$?;
x
0

ubun-virtual-machine ~ » pkexec echo x; echo $?;
x
0

但是需要输入密码
环境:
yyyyy- -yyyyyy+ OS: Ubuntu 18.04 bionic
://+//////-yyyyyyo Kernel: x86_64 Linux 5.4.0-150-generic

bash: pkexec: command not found
127

```
$ pkexec echo x; echo $?;
x
0
```

Fedora 37, KDE, 会提示输入 root 密码

Deepin 20.9
Linux Ori-DP 5.17.3-amd64-desktop #1 SMP PREEMPT Fri Apr 29 15:22:29 CST 2022 x86_64 GNU/Linux
```
~ ⌚ 9:57:42
$ pkexec echo x; echo $?
x
0
```
回车后，弹出密码验证框

manjaro kde
pkexec echo x; echo $?
x
0
pkexec echo x; echo $?
Error executing command as another user: Not authorized

This incident has been reported.
127

~ sudo pkexec echo x; echo $?;
x
0
~ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux trixie/sid
Release: n/a
Codename: trixie
Debian 12

Arch Linux 6.3.8-arch1-1 直接 x11 套 awesome wm ， 加不加 sudo 有两种结果

$ pkexec echo x; echo $?;
x
0

$ sudo pkexec echo x; echo $?;
==== AUTHENTICATING FOR org.freedesktop.policykit.exec ====
Authentication is needed to run `/usr/bin/echo' as the super user
Authenticating as: Max (max)
Password:
polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
==== AUTHENTICATION FAILED ====
Error executing command as another user: Not authorized

This incident has been reported.
127

msys2

➜ ~ pkexec echo x; echo $?;
zsh: command not found: pkexec
127
➜ ~

[root@dev3430 ~]# pkexec echo x; echo $?;
x
0

[root@ypzflqgbrczsm2nr ~]# neofetch
##### [email protected]
####### -------------------------------
##O#O## OS: Anolis OS 8.8 x86_64
####### Host: OpenStack Compute 17.0.3-1.el7
########### Kernel: 5.10.134-14.1.an8.x86_64
############# Uptime: 22 days, 21 hours, 1 min
############### Packages: 823 (rpm)
################ Shell: bash 4.4.20
################# Resolution: 1024x768
##################### Terminal: /dev/pts/0
##################### CPU: Intel Xeon (Skylake, IBRS) (2) @ 2.299GHz
################# GPU: 00:02.0 Cirrus Logic GD 5446
Memory: 846MiB / 3725MiB
[root@ypzflqgbrczsm2nr ~]# pkexec echo x; echo $?;
x
0

Manjaro ARM：

[marly@manjaro ~]$ sudo inxi -F
System:
Host: manjaro Kernel: 6.3.0-1-MANJARO-ARM-ODROID arch: aarch64 bits: 64 Console: pty pts/1
Distro: Manjaro ARM
Machine:
Type: ARM System: Amlogic Meson GXBB P201 Development Board details: N/A
CPU:
Info: quad core model: N/A variant: cortex-a53 bits: 64 type: MCP
Speed (MHz): avg: 2016 min/max: 100/2016 cores: 1: 2016 2: 2016 3: 2016 4: 2016
Graphics:
Device-1: meson-gxbb-dw-hdmi driver: meson_dw_hdmi v: N/A
Device-2: meson-gxbb-vpu driver: meson_drm v: N/A
Device-3: meson-gxbb-mali driver: lima v: kernel
Display: server: Xwayland v: 23.1.1 driver: N/A tty: 179x49
API: EGL/GBM Message: No known Wayland EGL/GBM data sources.
Audio:
Device-1: meson-gxbb-dw-hdmi driver: meson_dw_hdmi
API: ALSA v: k6.3.0-1-MANJARO-ARM-ODROID status: kernel-api
Network:
Device-1: meson-gxbb-dwmac driver: meson8b_dwmac
IF: eth0 state: up speed: 100 Mbps duplex: full mac: 2e:a9:49:75:91:71
Device-2: pwm-clock driver: pwm_clock
IF-ID-1: ip6tnl0 state: down mac: 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
Drives:
Local Storage: total: 123.02 GiB used: 14.85 GiB (12.1%)
ID-1: /dev/mmcblk0 model: ED2S5 size: 119.38 GiB
ID-2: /dev/mmcblk1 model: 4FPD3R size: 3.64 GiB
Partition:
ID-1: / size: 116.99 GiB used: 14.79 GiB (12.6%) fs: ext4 dev: /dev/mmcblk0p2
ID-2: /boot size: 457.5 MiB used: 53.8 MiB (11.8%) fs: vfat dev: /dev/mmcblk0p1
Swap:
Alert: No swap data was found.
Sensors:
Src: lm-sensors+/sys Message: No sensor data found using /sys/class/hwmon or lm-sensors.
Info:
Processes: 158 Uptime: 18d 8h 21m Memory: available: 922.9 MiB used: 474.8 MiB (51.4%)
Init: systemd Shell: Bash inxi: 3.3.27


[marly@manjaro ~]$ pkexec echo x; echo $?;
==== AUTHENTICATING FOR org.freedesktop.policykit.exec ====
Authentication is needed to run `/usr/bin/echo' as the super user
Authenticating as: marly
Password:
polkit-agent-helper-1: error response to PolicyKit daemon: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: No session for cookie
==== AUTHENTICATION FAILED ====
Error executing command as another user: Not authorized

This incident has been reported.
127
[marly@manjaro ~]$ sudo pkexec echo x; echo $?;
x
0