commandline session
$ 4.2.20 43 543---> export LANG=en_IN $ 4.2.20 44 544---> ls Algorithms/[A-Z]* Algorithms/filereading.c Algorithms/wordmatch.c $ 4.2.20 45 545---> export LANG=POSIX $ 4.2.20 46 546---> echo $LANG POSIX $ 4.2.20 47 547---> locale LANG=POSIX LANGUAGE=en_IN:en LC_CTYPE="POSIX" LC_NUMERIC="POSIX" LC_TIME="POSIX" LC_COLLATE="POSIX" LC_MONETARY="POSIX" LC_MESSAGES="POSIX" LC_PAPER="POSIX" LC_NAME="POSIX" LC_ADDRESS="POSIX" LC_TELEPHONE="POSIX" LC_MEASUREMENT="POSIX" LC_IDENTIFICATION="POSIX" LC_ALL= $ 4.2.20 48 548---> ls Algorithms/[A-Z]* ls: cannot access Algorithms/[A-Z]*: No such file or directory $ 4.2.20 49 549---> export LANG=en_IN $ 4.2.20 50 550---> ls Algorithms/[A-Z]* Algorithms/filereading.c Algorithms/wordmatch.c $ 4.2.20 51 551---> ls Algorithms/[[:upper:]]* ls: cannot access Algorithms/[[:upper:]]*: No such file or directory $ 4.2.20 52 552---> echo $LANG en_IN $ 4.2.20 53 553---> export LANG=POSIX $ 4.2.20 54 554---> echo $LANG POSIX $ 4.2.20 55 555---> ls Algorithms/[[:upper:]]* ls: cannot access Algorithms/[[:upper:]]*: No such file or directory $ 4.2.20 56 556---> export LANG=en_IN $ 4.2.20 57 557---> ls Algorithms/[[:upper:]]* ls: cannot access Algorithms/[[:upper:]]*: No such file or directory $ 4.2.20 58 558---> export LANG=en_IN $ 4.2.20 59 559---> ls Algorithms/[A]* ls: cannot access Algorithms/[A]*: No such file or directory $ 4.2.20 60 560---> ls Algorithms/[A-Z]* Algorithms/filereading.c Algorithms/wordmatch.c $ 4.2.20 61 561---> export LANG=POSIX $ 4.2.20 62 562---> ls Algorithms/[A-Z]* ls: cannot access Algorithms/[A-Z]*: No such file or directory $ 4.2.20 63 563---> echo $LANG POSIX $ 4.2.20 64 564---> ls Algorithms/[[:lower:]]* Algorithms/algorithm.c Algorithms/filereading.c Algorithms/wordmatch.c $ 4.2.20 100 5100--->