, the shell reports No
such file or directory because there is not a file named the string you
specified on the command line (the SPACEs are not special characters when
they are enclosed within single quotation marks).
3. Sort,tsort diff, patch,diff3, sdiff, cmp, comm, uniq, expand, unexpand, cut, colrm, paste, join, head, tail, grep, look, sed,awk, sed, awk, wc, tr, fold, fmt, ptx, column, nl, pr, gettext, iconv, recode, groff, gs, TeX, lex, yacc,
4. $ function pores }
* Chmod u+x
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