Setting up SSH Keys

1. Create the RSA Key Pair on home machine
   $ ssh-keygen -t rsa
2. Store the keys and passphrase
   Push enter twice to the prompts for where to save the key and the passphrase
3. Copy the public Key to the away machine
   $ ssh-copy-id username@away.machine
   or if ssh-copy-id is not a functioning command
   $ cat ~/.ssh/id_rsa.pub | ssh username@away.machine "mkdir -p ~/.ssh && chmod 700 ~/.ssh && cat >> ~/.ssh/authorized_keys"

How to 'git rm' all deleted files shown by 'git status'

git rm `git status | grep deleted | awk '{print $2}'`

Find empty Simplexes

for sim in Simplex_*; do cd $sim; if [ ! -s ATTEMPTS.txt ]; then echo $sim; fi; cd ..; done

Latex page setting definitions

Upload to Box via the command line

To send a directory recursively to Box from the command line, use:

find directoryname -type f -exec curl -1 --disable-epsv --ftp-skip-pasv-ip -u username:password --ftp-ssl --ftp-create-dirs --upload-file {} ftps://ftp.box.com/{} \;

Delete OAR* files

In order to remove all the OAR* files in directory tree use the following command.

find . -name "OAR*" -type f -delete

Auto-indent and clean up .f files

Open the file in emacs: emacs file.h

Select the entire file: C-x h

Auto-indent: C-M-\

Save the file: C-x s

Close emacs: C-x C-c

Making all citekeys in Papers universal

In the terminal, make the following command making sure the path is right:

sqlite3 '/Users/your_name/Documents/Papers2/Library.papers2/Database.papersdb'

Then in sqlite enter the following:

UPDATE Publication SET citekey = NULL;

Then ctrl-D to exit.

Running Mathematica scripts from command line

Math -noprompt -run "<<script.m"

Passing arrays in C++

There are three ways to pass an array to a function in C++:

`void by_value(const T* array) // const T array[] means the same

void by_pointer(const T (*array)[U])

void by_reference(const T (&array)[U])`

Source

Preparing asteroidbelt files

This is an example simple command to move all of the pl.dat files into a single directory from a set of runs.

for dir in Run*; do cp $dir/OUT/dump_pl.dat ../belt/100km-$dir-pl.dat; done

This how to loop through the files to input them into belt_statistics

for run in *pl.dat; do echo $run > temp; ./belt_statistics < temp; don

Tar and Gzip

To pack:
tar cvf - FILE-LIST | gzip -c > FILE.tar.gz

To unpack:
gunzip < FILE.tar.gz | tar xvf -

Creating .gitignore

The following command collects all of the untracked files within a git directory and moves them to .gitignore.

git status --porcelain | grep '^??' | cut -c4- >> .gitignore