Category: Computer Tips

RAID6 is supposed to have two sets of redundancy that could survive a simultaneous failure of two drives, and it can go directly on automatic rebuilding if you have hot swaps. However, you must have known that the RAID controller and the back plane are still playing dictatorship for a RAID group. It could happen […]

The 16 group limit with auth_sys is not tuneable. It is defined in RFC_5331 and cannot be adjusted or patched. However for linux running nfs-utils version over 1.0.12 and kernel version over 2.6.21, you can make rpc.mountd to manage gid to avoid this limitation. To do this: On all your nfs server, edit /etc/nfs.conf, add […]

yum install -y ninja-build cmake -GNinja ../src ninja-build

under su: mkdir ~/.R echo “CPPFLAGS=-fpermissive” >> ~/.R/Makevars ln -s /location/of/LINDA /usr/local/ R in “R”: install.packages(“Rcpp”) install.packages(“magrittr”) install.packages(“drat”) drat::addRepo(“ANTs-R”) install.packages(“ANTsR”) install.packages(“randomForest”) source(‘/usr/local/LINDA/linda_predict.R’) q()

Method 1 openssl passwd -1 -salt xyz yourpass Method 2 makepasswd –clearfrom=- –crypt-md5 <<< YourPass Method 3 echo "username:password" | chpasswd Or you can use encrypted password with chpasswd first generate it using : perl -e 'print crypt("YourPasswd", "salt"),"\n"' then later you can use generated password to update echo "username:encryptedPassWd" | chpasswd -e this encrypted […]

So do not put matlab runtime into ld.so.conf.d. If yum broken, remove that file and do ldconfig.

sudo find . -maxdepth 1 -type d ! -name . -exec du -sh ‘{}’ \; | sort -h

Starting Matlab R2015a or newer in CentOS7 or recent version of Fedora, the error libGL error: dlopen /usr/lib64/dri/swrast_dri.so failed will rise through does not affect the normal working of Matlab. This problem is caused by the libstdc++.so.6 coming with Matlab. Matlab carries statically linked libstdc++.so.6.0.17 in /matlab_folder/sys/os/glnxa64. When the system version of libstdc++.so.6 is lower […]

htdigest [-c for create password file] password_file_name ‘realm name’ username it will prompt you twice for a password.

pip install –upgrade numpy scipy && pip install –upgrade nipype nibabel nitime pyyaml pandas cd qap python setup.py install