on 30-Aug-2019 (Fri)

Question

The connection between the talus and calcaneus forms the [...] joint.

Answer

Subtalar

Tags

#christina

Question

Tia

Answer

786738

Question

How to include function in a bash script ?

Answer

source filename [arguments]

source functions.sh

source /path/to/functions.sh arg1 arg2

source functions.sh WWWROOT=/apache.jail PHPROOT=/fastcgi.php_jail

Question

How to write a factorial function recursivly ?

Answer

• A recursive function is a function that repeatedly calls itself.
• No limit is placed on the number of recursive calls.
• Create a shell script called fact.sh:

 #!/bin/bash
# fact.sh - Shell script to to find factorial of given command line arg
factorial () {
 local i = $1
 local f
 declare -i i
 declare -i f

 # factorial() is called until the value of $f is returned and is it is <= 2
 # This is called the recursion
 [ $i -le 2 ] && echo $i || { f = $(( i - 1 ))
 f = $( factorial $f )
 f = $(( f * i ))
 echo $f ; } }

# display usage [ $# -eq 0 ] && { echo "Usage: $0 number" ; exit 1 ; }
# call factorial
factorial $1 

Save and close the file. Run it as follows:

 chmod +x fact.sh
./fact.sh
./fact.sh 2 ./fact.sh 5 

Question

How do the return syntax looks like ?

Answer

Syntax

• The return command causes a function to exit with the return value specified by N and syntax is:

return N

• If N is not specified, the return status is that of the last command.
• The return command terminates the function.
• The return command is not necessary when the return value is that of the last command executed.

Question

How to dot sourcing a function ?

Answer

. /path/to/fuctions.sh

Question

How to write a helper function for backup ?

Answer

dobackup (){

# put backup commands here

tar -zcvf /dev/st0 /home >/dev/null 2 > & 1

}

Question

How to remove a function ?

Answer

unset -f functionName

Question

How to backup with rsync ?

Answer

# rsync -av /home/* /srv/home/

Question

How to back up with cp ?

Answer

# cp -aR /home/* /srv/home/

Question

For which backups is tar not usable ?

Answer

1. Backup Restore using tar command

tar features:

1. tar ( tape archive ) is used for single or multiple files backup and restore on/from a tape or file.
2. tar can not backup special character & block device files , shows as 0 byte files with first letter of permissions as b or c for block or character.
3. tar Works only on mounted file system, it can not access the files on unmounted file system.

Question

Which files can you backup with cpio ?

Answer

2. Backup restore using cpio command

cpio features

1. Used for single or multiple files backup .
2. Can backup special character & block device files .
3. Works only on mounted file system.
4. Need a list of files to be backed up .
5. Preserve hard links and time stamps of the files .

Question

How should you backup ext2,3,4 filesystem ?

Answer

ext2 ext3 ext4 backup and restore can be easily done with a dump utility which allows you to take full and incremental file system backup. Backup can be taken on a tape , file or a remote system and restore full or selective files

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#bones #bony #femur #has-images #landmarks

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#computer-science #machine-learning #reinforcement-learning

Question

Answer

Monte Carlo

Tags

#bones #bony #femur #has-images #landmarks

Question

glue code

Answer

is executable code (often source code) that serves solely to "adapt" different parts of code that would otherwise be incompatible

Question

An example of system-level interactions in ML that leads to tech debt

Answer

chaining of input signals

Question

ML is required in exactly those cases when the desired behavior cannot be

Answer

effectively expressed in software logic without dependency on external data .

Question

CACE principle

Answer

Changing Anything Changes Everything

Question

Entanglement

Answer

Machine learning systems mix signals together , entangling them and making iso- lation of improvements impossible

Question

Correction Cascades

Answer

There are often situations in which model m_a for problem A exists, but a solution for a slightly different problem A′ is required. In this case, it can be tempting to learn a model m′_a that takes m_a as input and learns a small correction as a fast way to solve the problem

Question

Undeclared Consumers.

Answer

Oftentimes, a prediction from a machine learning model m_a is made widely accessible, either at runtime or by writing to files or logs that may later be consumed by other systems. Without access controls, some of these consumers may be undeclared, silently using the output of a given model as an input to another system. In more classical software engineering, these issues are referred to as [...]

Question

Unstable Data Dependencies.

Answer

To move quickly , it is often convenient to consume signals as input features that are produced by other systems. However, some input signals are unstable, meaning that they qualitatively or quantitatively change behavior over time. This can happen implicitly, when the input signal comes from another machine learning model itself that updates over time, or a data-dependent lookup table, such as for computing TF/IDF scores or semantic mappings.

Question

Underutilized Data Dependencies

Answer

underutilized data dependencies are input signals that provide little incremental modeling benefit.