Scenario 1. Install Python3 on my CentOS7
CentOS7 comes with python (2.7.5), but I need python3, the installation note is recorded here.
I used the Digital Ocean in the past, it shows an old note for installation. But, it needs payment information now, therefore, I have to skip it.
Installing python3 on centos7 1000 sudo yum -y update 1001 sudo yum -y install yum-utils 1002 sudo yum -y groupinstall development 1003 sudo yum -y install https://centos7.iuscommunity.org/ius-release.rpm
However, it seems that Python group has version 3.7.4
I ended up using help here to install python3.7.4
Since I am installing on the user’s level, I used “sudo”
1005 sudo yum install gcc openssl-devel bzip2-devel libffi-devel 1010 cd /usr/src 1014 wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz 1015 sudo wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz 1016 sudo tar xzf Python-3.7.4.tgz 1017 cd Python-3.7.4 1018 sudo ./configure --enable-opimizations 1019 sudo make altinstall 1020 sudo rm /usr/src/Python-3.7.4.tgz 1021 python3.7 -V
Wow, it turns out that I have python3.6 installed. Now, I have two python3. I create a symbolic link to python3.7 anyway.
bash-4.2$ pwd /usr/bin bash-4.2$ ls -al python* lrwxrwxrwx. 1 root root 7 Jul 11 18:08 python -> python2 lrwxrwxrwx. 1 root root 9 Jul 11 18:08 python2 -> python2.7 -rwxr-xr-x. 1 root root 7216 Jun 20 16:28 python2.7 lrwxrwxrwx. 1 root root 9 Jul 31 11:03 python3 -> python3.6 lrwxrwxrwx. 1 root root 18 Jul 31 11:03 python36 -> /usr/bin/python3.6 -rwxr-xr-x. 2 root root 11408 Apr 25 17:05 python3.6 -rwxr-xr-x. 2 root root 11408 Apr 25 17:05 python3.6m lrwxrwxrwx. 1 root root 24 Jul 31 13:24 python3.7 -> /usr/local/bin/python3.7
Lastly, I followed the instruction and get an python virtual environment set up
bash-4.2$ pwd /ddn/gs1/home/li11/pythonProject mkdir pythonWVenv/my_project_venv/ cd python3.6 -m my_project_venv bash-4.2$ ls pythonWVenv/my_project_venv/ bin include lib lib64 pip-selfcheck.json pyvenv.cfg share source pythonWVenv/my_project_venv/bin/activate (my_project_venv) bash-4.2$ python -V Python 3.6.3
Now, I create a new python environment with python3.7
bash-4.2$ pwd /ddn/gs1/home/li11/pythonProject/pythonWVenv bash-4.2$ mkdir PyVenv37 bash-4.2$ python3.7 -m venv PyVenv37 bash-4.2$ source PyVenv37/bin/activate (PyVenv37) bash-4.2$ python -V Python 3.7.4 (PyVenv37) bash-4.2$
Scenario 2. Install PyCharm on my CentOS7
It seems quite simple, plus there is an Indian guy who makes a video on the installation.. A few steps would be enough
Download the PyCharm Community version from the jetbean portal. Unzip the tarball and test the executable Put it in /bin/path Configure a virtual python environment within Pycharm render much convenience for programming.
Scenario 3. Install vlc on my CentOS7
I need to run mp4 video, and it turns out vlc is the commonly used media player. Therefore, I need to install it on my CentOS7. Following this help or this link, it seems simple. But, it does not work for me for the following error.
Finished Dependency Resolution
Error: Package: vlc-core-2.1.6-2.el6.nux.x86_64 (nux-dextop)
Requires: libmatroska.so.4()(64bit)
Error: Package: vlc-core-2.1.6-2.el6.nux.x86_64 (nux-dextop)
Requires: libdvbpsi.so.9()(64bit)
Error: Package: ffmpeg-libs-2.6.8-3.el6.nux.x86_64 (nux-dextop)
Requires: libgnutls.so.26(GNUTLS_1_4)(64bit)
Error: Package: vlc-core-2.1.6-2.el6.nux.x86_64 (nux-dextop)
Requires: libebml.so.3()(64bit)
Error: Package: ffmpeg-libs-2.6.8-3.el6.nux.x86_64 (nux-dextop)
Requires: libgnutls.so.26()(64bit)
Error: Package: vlc-core-2.1.6-2.el6.nux.x86_64 (nux-dextop)
Requires: libudev.so.0()(64bit)
Error: Package: ffmpeg-libs-2.6.8-3.el6.nux.x86_64 (nux-dextop)
Requires: libopenjpeg.so.2()(64bit)
Error: Package: faac-1.28-2.el6.nux.x86_64 (nux-dextop)
Requires: libmp4v2.so.0()(64bit)
Error: Package: vlc-core-2.1.6-2.el6.nux.x86_64 (nux-dextop)
Requires: libmtp.so.8()(64bit)
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
I used google search hopefully to get all the dependencies that it misses, with a hope to make vlc work.
Scenario 4: Mount a network drive
This is my workstation, I need to mount a network drive for my linux at NIEHS
Install package: fuse-sshfs sudo sshfs -o allow_other li11@scigate:/ddn/gs1/home/li11 ~/ddnDrive/ Or, to unmount: sudo umount -f /Users/plummie/Documents/stanford
Scenario 5: Working with Docker
I have a separate page on how to work with Docker under CentOS7.
Scenario 6: When I connect my laptop to the ethernet, it needs special editing work
There is a good post that I follow, and it works!
Scenario 7: install R/Rstudio
Following the online doc or the documentation from Rstudio directly.
sudo yum install epel-release sudo yum install R wget https://download1.rstudio.org/rstudio-1.1.419-x86_64.rpm yum install rstudio-1.1.419-x86_64.rpm Launch a browser and go to http://localhost:8787/
There has been new release of Rstudio server for CentOS 6/7 and 8 separately.
wget https://download2.rstudio.org/server/centos6/x86_64/rstudio-server-rhel-1.2.5033-x86_64.rpm sudo yum install rstudio-server-rhel-1.2.5033-x86_64.rpm
To check whether Rstudio is working:
systemctl status rstudio-server.service sudo rstudio-server verify-installation
Mine installation has a glitch as the “admin” account was confused, therefore I had to ask our SysAdmin to help.
I tested the sudo and it worked perfectly fine. However, there is one application, which needs the sudo to install, but it fails to accept my “admin credential”. I suspect that it gets confused which “log in” it needs to take. When you get a chance, could you please swing by or I can come to your desk? I hope it will be an easy fix for you.
He gets it sorted out
Got rstudio sorted out. It authenticates using PAM, but it uses its own PAM module which doesn’t really work properly out of the box. I moved over a modified copy of the standard module we use and you should be able to login now. Please check and let me know.
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