...
Command | Description | ||
grep |
|
...
Examples: Search a file
| Info |
|---|
Remember, Linux in general, and grep are case-sensitive. |
| Info |
|---|
Search for the capitalized |
| Code Block |
|---|
[intro_to_linux]$ grep nvidia software.csv
[intro_to_linux]$
# Remember: grep is case-sensitive
[intro_to_linux]$ grep NVIDIA software.csv
libraries and toolkits,cuDNN,cudnn,beartooth,The NVIDIA CUDA Deep...
libraries and toolkits,TensorRT,,beartooth,"NVIDIA TensorRT, an...
# Some items returned, but there could be others.
# Neither of the above picked up “Nvidia”.
|
| Info |
|---|
The above identified and returned two locations where But this would not pick up the text Nvidia. Modify the command-line to ignore-case using the |
| Code Block |
|---|
[intro_to_linux]$ grep -i NVidia software.csv
compiler,NVidia HPC SDK,nvhpc,"beartooth,teton"...
libraries and toolkits,cuDNN,cudnn,beartooth,The NVIDIA CUDA Deep...
libraries and toolkits,TensorRT,,beartooth,"NVIDIA TensorRT, an...
# Ignore the case of the word to search for.
|
| Info |
|---|
Modify the command-line to display the the line numbers within the file using the |
| Code Block |
|---|
[intro_to_linux]$ grep -n -i NVidia software.csv
145:compiler,NVidia HPC SDK,nvhpc,"beartooth,teton"...
152:libraries and toolkits,cuDNN,cudnn,beartooth,The NVIDIA CUDA Deep...
166:libraries and toolkits,TensorRT,,beartooth,"NVIDIA TensorRT, an...
# Include the line # from which the text was found. |
...
Examples: Search folders and files
| Info |
|---|
Use the wildcard |
| Code Block |
|---|
[intro_to_linux]$ cd clusters/ [clusters]$ grep -i nvidia * beartooth.html: .../788758554/NVidia+HPC+SDK">NVidia HPC SDK</a></td> teton.html: .../788758554/NVidia+HPC+SDK">NVidia HPC SDK</a></td> [clusters]$ cd .. |
| Info |
|---|
Remember: case-sensitivity: |
| Code Block |
|---|
[intro_to_linux]$ grep -i nvidia * grep: clusters: Is a directory software.csv:compiler,NVidia HPC SDK,nvhpc,"beartooth,teton"... software.csv:libraries and toolkits,cuDNN,cudnn,beartooth,The NVIDIA CUDA Deep... software.csv:libraries and toolkits,TensorRT,,beartooth,"NVIDIA TensorRT, an.... |
| Info |
|---|
Modify the command-line, using the |
| Code Block |
|---|
[intro_to_linux]$ grep -r -i nvidia * clusters/teton.html: .../788758554/NVidia+HPC+SDK">NVidia HPC SDK</a></td> clusters/beartooth.html: .../788758554/NVidia+HPC+SDK">NVidia HPC SDK</a></td> software.csv:compiler,NVidia HPC SDK,nvhpc,"beartooth,teton"... software.csv:libraries and toolkits,cuDNN,cudnn,beartooth,The NVIDIA CUDA Deep... software.csv:libraries and toolkits,TensorRT,,beartooth,"NVIDIA TensorRT, an... |
...
Which named applications are related to the words “bayes”?
Which files contain reference to IPA?
...
Answers
| Info |
|---|
Question 01: Which named applications are related to the words “bayes”? This assumes we want to find all instances of “bayes” regardless of case. |
| Code Block |
|---|
[intro_to_linux]$ grep -i bayes software.csv
application,Bayescan,bayescan,beartooth,"BayeScan aims...
application,Beast1,beast1,wildiris,BEAST is a cross-platform program for Bayesian...
application,Beast2,beast2,beartooth,"BEAST 2 is a cross-platform program for Bayesian...
application,Freebayes,freebayes,beartooth,"freebayes is a Bayesian genetic...
application,Jags,jags,"beartooth,teton",Just Another Gibbs Sampler. It is a program for analysis of Bayesian hierarchical...
application,RevBayes,revbayes,wildiris,Bayesian phylogenetic...
application,ROHan,rohan,teton,"ROHan is a Bayesian framework...
application,SourceTracker2,sourcetracker2,"beartooth,teton","SourceTracker, a Bayesian approach...
|
| Info |
|---|
Question 02: Which files contain reference to IPA? In this case we want to explicitly search for IPA (all upper-case) and recursively search through all folders. |
| Code Block |
|---|
[intro_to_linux]$ grep -r IPA * clusters/beartooth.html: .../pages/1893597185/IPA">IPA</a></td> software.csv:application,IPA,ipa,beartooth,Improved Phased Assembler (IPA) is... |
...