Question about instructions for Point Cloud Library (pcl) install on Ubuntu 16.04
In following instructions for pcl install:
How to install Point Cloud Library v1.8 (pcl-1.8.0) on Ubuntu 16.04.2 [LTS] for C++?
why after:
sudo apt-mark hold libeigen3-dev
is there not
sudo apt-mark unhold libeigen3-dev
software-installation pcloud
edited 2 days ago
Kevin Bowen
14.5k155970
asked 2 days ago
Richard NunziataRichard Nunziata
84
add a comment |
In following instructions for pcl install:
How to install Point Cloud Library v1.8 (pcl-1.8.0) on Ubuntu 16.04.2 [LTS] for C++?
why after:
sudo apt-mark hold libeigen3-dev
is there not
sudo apt-mark unhold libeigen3-dev
software-installation pcloud
edited 2 days ago
Kevin Bowen
14.5k155970
asked 2 days ago
Richard NunziataRichard Nunziata
84
add a comment |
In following instructions for pcl install:
How to install Point Cloud Library v1.8 (pcl-1.8.0) on Ubuntu 16.04.2 [LTS] for C++?
why after:
sudo apt-mark hold libeigen3-dev
is there not
sudo apt-mark unhold libeigen3-dev
software-installation pcloud
edited 2 days ago
Kevin Bowen
14.5k155970
asked 2 days ago
Richard NunziataRichard Nunziata
84
In following instructions for pcl install:
How to install Point Cloud Library v1.8 (pcl-1.8.0) on Ubuntu 16.04.2 [LTS] for C++?
why after:
sudo apt-mark hold libeigen3-dev
is there not
sudo apt-mark unhold libeigen3-dev
software-installation pcloud
software-installation pcloud
edited 2 days ago
Kevin Bowen
14.5k155970
asked 2 days ago
Richard NunziataRichard Nunziata
84
edited 2 days ago
Kevin Bowen
14.5k155970
asked 2 days ago
Richard NunziataRichard Nunziata
84
edited 2 days ago
Kevin Bowen
14.5k155970
edited 2 days ago
Kevin Bowen
14.5k155970
edited 2 days ago
Kevin Bowen
14.5k155970
14.5k155970
asked 2 days ago
Richard NunziataRichard Nunziata
84
asked 2 days ago
Richard NunziataRichard Nunziata
84
asked 2 days ago
Richard NunziataRichard Nunziata
84
84
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
From man apt-mark
PREVENT CHANGES FOR A PACKAGE
hold
hold is used to mark a package as held back, which will prevent the
package from being automatically installed, upgraded or removed.
unhold
unhold is used to cancel a previously set hold on a package to
allow all actions again.
So, the pcl v1.8 app you are trying to install probably needs a specific version 3.2.5-4 of the libeigen3-dev. This is called dependency. However, Ubuntu 16.04 probably uses a different version of the same file which probably does not work for pcl.
The hold tells Ubuntu not to update the libeigen3-dev you have installed specifically for pcl v1.8. After you run the command:
sudo apt-mark hold libeigen3-dev
Ubuntu will remember not to update this specific file.
If you use the unhold option then the special version of libeigen3-dev that works with pcl v1.8 will be replaced by the version that does not work with pcl v.1.8.
Note, as the installation guide implies, this issue is resolved in newer version pcl v1.8.1 and Ubnutu 17.10, as there is no apt-mark hold command needed for these versions.
It is possible that the libeigen3-dev (version 3.3.4-4) in the current version of Ubuntu 16.04 also does not suffer from this problem. If so, you may use the apt-mark unhold to let Ubuntu update this file.
If pcl breaks, then repeat the 4 lines of instructions including the apt-mark hold:
cd ~/Downloads
wget http://launchpadlibrarian.net/209530212/libeigen3-dev_3.2.5-4_all.deb
sudo dpkg -i libeigen3-dev_3.2.5-4_all.deb
sudo apt-mark hold libeigen3-dev
This will download the pcl compatible version of libeigen3-dev again and install it.
Hope this helps
answered 2 days ago
user68186user68186
15.8k84769
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
From man apt-mark
PREVENT CHANGES FOR A PACKAGE
hold
hold is used to mark a package as held back, which will prevent the
package from being automatically installed, upgraded or removed.
unhold
unhold is used to cancel a previously set hold on a package to
allow all actions again.
So, the pcl v1.8 app you are trying to install probably needs a specific version 3.2.5-4 of the libeigen3-dev. This is called dependency. However, Ubuntu 16.04 probably uses a different version of the same file which probably does not work for pcl.
The hold tells Ubuntu not to update the libeigen3-dev you have installed specifically for pcl v1.8. After you run the command:
sudo apt-mark hold libeigen3-dev
Ubuntu will remember not to update this specific file.
If you use the unhold option then the special version of libeigen3-dev that works with pcl v1.8 will be replaced by the version that does not work with pcl v.1.8.
Note, as the installation guide implies, this issue is resolved in newer version pcl v1.8.1 and Ubnutu 17.10, as there is no apt-mark hold command needed for these versions.
It is possible that the libeigen3-dev (version 3.3.4-4) in the current version of Ubuntu 16.04 also does not suffer from this problem. If so, you may use the apt-mark unhold to let Ubuntu update this file.
If pcl breaks, then repeat the 4 lines of instructions including the apt-mark hold:
cd ~/Downloads
wget http://launchpadlibrarian.net/209530212/libeigen3-dev_3.2.5-4_all.deb
sudo dpkg -i libeigen3-dev_3.2.5-4_all.deb
sudo apt-mark hold libeigen3-dev
This will download the pcl compatible version of libeigen3-dev again and install it.
Hope this helps
answered 2 days ago
user68186user68186
15.8k84769
add a comment |
From man apt-mark
PREVENT CHANGES FOR A PACKAGE
hold
hold is used to mark a package as held back, which will prevent the
package from being automatically installed, upgraded or removed.
unhold
unhold is used to cancel a previously set hold on a package to
allow all actions again.
So, the pcl v1.8 app you are trying to install probably needs a specific version 3.2.5-4 of the libeigen3-dev. This is called dependency. However, Ubuntu 16.04 probably uses a different version of the same file which probably does not work for pcl.
The hold tells Ubuntu not to update the libeigen3-dev you have installed specifically for pcl v1.8. After you run the command:
sudo apt-mark hold libeigen3-dev
Ubuntu will remember not to update this specific file.
If you use the unhold option then the special version of libeigen3-dev that works with pcl v1.8 will be replaced by the version that does not work with pcl v.1.8.
Note, as the installation guide implies, this issue is resolved in newer version pcl v1.8.1 and Ubnutu 17.10, as there is no apt-mark hold command needed for these versions.
It is possible that the libeigen3-dev (version 3.3.4-4) in the current version of Ubuntu 16.04 also does not suffer from this problem. If so, you may use the apt-mark unhold to let Ubuntu update this file.
If pcl breaks, then repeat the 4 lines of instructions including the apt-mark hold:
cd ~/Downloads
wget http://launchpadlibrarian.net/209530212/libeigen3-dev_3.2.5-4_all.deb
sudo dpkg -i libeigen3-dev_3.2.5-4_all.deb
sudo apt-mark hold libeigen3-dev
This will download the pcl compatible version of libeigen3-dev again and install it.
Hope this helps
answered 2 days ago
user68186user68186
15.8k84769
add a comment |
From man apt-mark
PREVENT CHANGES FOR A PACKAGE
hold
hold is used to mark a package as held back, which will prevent the
package from being automatically installed, upgraded or removed.
unhold
unhold is used to cancel a previously set hold on a package to
allow all actions again.
So, the pcl v1.8 app you are trying to install probably needs a specific version 3.2.5-4 of the libeigen3-dev. This is called dependency. However, Ubuntu 16.04 probably uses a different version of the same file which probably does not work for pcl.
The hold tells Ubuntu not to update the libeigen3-dev you have installed specifically for pcl v1.8. After you run the command:
sudo apt-mark hold libeigen3-dev
Ubuntu will remember not to update this specific file.
If you use the unhold option then the special version of libeigen3-dev that works with pcl v1.8 will be replaced by the version that does not work with pcl v.1.8.
Note, as the installation guide implies, this issue is resolved in newer version pcl v1.8.1 and Ubnutu 17.10, as there is no apt-mark hold command needed for these versions.
It is possible that the libeigen3-dev (version 3.3.4-4) in the current version of Ubuntu 16.04 also does not suffer from this problem. If so, you may use the apt-mark unhold to let Ubuntu update this file.
If pcl breaks, then repeat the 4 lines of instructions including the apt-mark hold:
cd ~/Downloads
wget http://launchpadlibrarian.net/209530212/libeigen3-dev_3.2.5-4_all.deb
sudo dpkg -i libeigen3-dev_3.2.5-4_all.deb
sudo apt-mark hold libeigen3-dev
This will download the pcl compatible version of libeigen3-dev again and install it.
Hope this helps
answered 2 days ago
user68186user68186
15.8k84769
From man apt-mark
PREVENT CHANGES FOR A PACKAGE
hold
hold is used to mark a package as held back, which will prevent the
package from being automatically installed, upgraded or removed.
unhold
unhold is used to cancel a previously set hold on a package to
allow all actions again.
So, the pcl v1.8 app you are trying to install probably needs a specific version 3.2.5-4 of the libeigen3-dev. This is called dependency. However, Ubuntu 16.04 probably uses a different version of the same file which probably does not work for pcl.
The hold tells Ubuntu not to update the libeigen3-dev you have installed specifically for pcl v1.8. After you run the command:
sudo apt-mark hold libeigen3-dev
Ubuntu will remember not to update this specific file.
If you use the unhold option then the special version of libeigen3-dev that works with pcl v1.8 will be replaced by the version that does not work with pcl v.1.8.
Note, as the installation guide implies, this issue is resolved in newer version pcl v1.8.1 and Ubnutu 17.10, as there is no apt-mark hold command needed for these versions.
It is possible that the libeigen3-dev (version 3.3.4-4) in the current version of Ubuntu 16.04 also does not suffer from this problem. If so, you may use the apt-mark unhold to let Ubuntu update this file.
If pcl breaks, then repeat the 4 lines of instructions including the apt-mark hold:
cd ~/Downloads
wget http://launchpadlibrarian.net/209530212/libeigen3-dev_3.2.5-4_all.deb
sudo dpkg -i libeigen3-dev_3.2.5-4_all.deb
sudo apt-mark hold libeigen3-dev
This will download the pcl compatible version of libeigen3-dev again and install it.
Hope this helps
answered 2 days ago
user68186user68186
15.8k84769
edited 2 days ago
answered 2 days ago
user68186user68186
15.8k84769
answered 2 days ago
user68186user68186
15.8k84769
answered 2 days ago
user68186user68186
15.8k84769
15.8k84769
add a comment |
add a comment |
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