Download Advanced Bash scripting guide Rev1.4 by Cooper M. PDF

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N" ] then mv $fname $n fi done # Traverse all files in directory. # Change name to lowercase. # Rename only files not already lowercase. exit 0 # Code below this line will not execute because of "exit". #--------------------------------------------------------# # To run it, delete script above line. # The above script will not work on filenames containing blanks or newlines. # Stephane Chazelas therefore suggests the following alternative: for filename in * # Not necessary to use basename, # since "*" won't return any file containing "/".

Chmod 644 filename # Makes "filename" readable/writable to owner, readable to # others # (octal mode). chmod 1777 directory-name # Gives everyone read, write, and execute permission in directory, # however also sets the "sticky bit". # This means that only the owner of the directory, # owner of the file, and, of course, root # can delete any particular file in that directory. html (3 of 4) [7/15/2002 6:33:51 PM] Basic Commands chattr Change file attributes. This has the same effect as chmod above, but with a different invocation syntax, and it works only on an ext2 filesystem.

If [ -z "$1" ] # Exit if no argument given. then echo "Usage: `basename $0` directory-to-copy-to" exit 65 fi ls . /{} $1 # This is the exact equivalent of # cp * $1 # unless any of the filenames has "whitespace" characters. exit 0 expr All-purpose expression evaluator: Concatenates and evaluates the arguments according to the operation given (arguments must be separated by spaces). Operations may be arithmetic, comparison, string, or logical. html (4 of 8) [7/15/2002 6:33:50 PM] Complex Commands The multiplication operator must be escaped when used in an arithmetic expression with expr.

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