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This may be entirely newbish, but I was under the impression any terminal command can be run inside the sage console.

For example:

sage: cd ~/Documents
/home/steven/Documents
sage: pwd
'/home/steven/Documents'
sage: mkdir test
sage: ls
1977_001.pdf      do_my_stuff.m        matlab@               test/
batch_script      Dropbox/         MATLAB/               test.pdf
caq_letter_2.odt  FIELDS_stuff/        passport_photo.jpg        test.svg
CAQ_letter.odt    french_passport.jpg  passport_plus_income_tax.pdf
costco_runs.xls   income_tax_1.pdf     research_funding/
sage: rm -r test
rm: remove directory `test'? y
sage: ls
1977_001.pdf      do_my_stuff.m        matlab@               test.pdf
batch_script      Dropbox/         MATLAB/               test.svg
caq_letter_2.odt  FIELDS_stuff/        passport_photo.jpg
CAQ_letter.odt    french_passport.jpg  passport_plus_income_tax.pdf
costco_runs.xls   income_tax_1.pdf     research_funding/

I don't really know how echo works, so I can't really help you there.

This may be entirely newbish, but I was under the impression any terminal command can be run inside the sage console.

For example:

sage: cd ~/Documents
/home/steven/Documents
sage: pwd
'/home/steven/Documents'
sage: mkdir test
sage: ls
1977_001.pdf      do_my_stuff.m        matlab@               test/
batch_script      Dropbox/         MATLAB/               test.pdf
caq_letter_2.odt  FIELDS_stuff/        passport_photo.jpg        test.svg
CAQ_letter.odt    french_passport.jpg  passport_plus_income_tax.pdf
costco_runs.xls   income_tax_1.pdf     research_funding/
sage: rm -r test
rm: remove directory `test'? y
sage: ls
1977_001.pdf      do_my_stuff.m        matlab@               test.pdf
batch_script      Dropbox/         MATLAB/               test.svg
caq_letter_2.odt  FIELDS_stuff/        passport_photo.jpg
CAQ_letter.odt    french_passport.jpg  passport_plus_income_tax.pdf
costco_runs.xls   income_tax_1.pdf     research_funding/

I don't really know how echo works, so I can't really help you there.