Ubuntu下安装snap包

我想在Ubuntu上⽤Mathpix Snipping Tool，上提⽰在Ubuntu中⽤以下命令安装.

sudo snap install mathpix-snipping-tool

但是⼀直卡在如下命令.

Download snap "core"(6673) from channel "stable"

于是去这个下了mathpix-snipping-tool的.snap⽂件，想直接安装.snap⽂件.⼜报错.

snap install mathpix-snipping-tool.snap

error: cannot find signatures with metadata for snap "mathpix-snipping-tool.snap"

在中，说是要

snap ack snipping-tool.assert

但是我在第三⽅平台中只能下.snap包，没有.assert⽂件.

If you don’t care about the assertion, you can run snap install --dangerous <the darktable snap you downloaded>, but then you won’t receive updates.

但是可以⽤ --dangerous参数.不管更新.

snap install --dangerous mathpix-snipping-tool.snap

半⼩时后，终于安装好了(泪).

常⽤命令

snap changes 查看正在进⾏的change

sudo snap abort ID 杀死某个进程

效果

我⼀般在Ubuntu下写代码，所以想在Ubuntu下写笔记，同时⽤公式来解释代码⾮常直观.这是我在Ubuntu下安装Mathpix Snipping Tool的初衷.下⾯的公式就是⽤ ctr+alt+M组合键得到的公式.

R= i(cosθ(i)

sinθ(i)

−sinθ(i)

cosθ(i))

对应代码

Eigen ::Matrix2d Rij_inv = (Zij .topLeftCorner (2,2)).transpose ();

Eigen ::Matrix2d Ri_inv = (Xi .topLeftCorner (2,2)).transpose ();

Eigen ::Matrix2d JR_theta ;

ubuntu安装教程JR_theta << -Xi (1,0), Xi (0,0),

-Xi (0,0), -Xi (1,0);

Ai .setZero ();

Ai .topLeftCorner (2,2) = -Rij_inv * Ri_inv ;

Ai .topRightCorner (2,1) = Rij_inv * JR_theta * (Xj .topRightCorner (2,1) - Xi .topRightCorner (2,1));Ai (2,2) = -1;

Bi .setZero ();

Bi .topLeftCorner (2,2) = Rij_inv * Ri_inv ;

Bi (2,2) = 1; 参考

snap教程itsfoss/use-snap-packages-ubuntu-16-04/A =ij =∂x i ∂e (x )

ij (−R R ij ⊤i

⊤0⊤R t −t ij ⊤∂θi ∂R i ⊤

(j i )

−1)