Advanced Bash scripting guide Rev1.4 by Cooper M.

By Cooper M.

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It is equivalent to a combination of cp and rm. It may be used to move multiple files to a directory, or even to rename a directory. For some examples of using mv in a script, see Example 9-15 and Example A-3. html (2 of 4) [7/15/2002 6:33:51 PM] Basic Commands When used in a non-interactive script, mv takes the -f (force) option to bypass user input. When a directory is moved to a preexisting directory, it becomes a subdirectory of the destination directory. bash$ mv source_directory target_directory bash$ ls -lF target_directory total 1 drwxrwxr-x 2 bozo bozo 1024 May 28 19:20 source_directory/ rm Delete (remove) a file or files.

Nl `basename $0` echo; echo # Now, let's try it with 'cat -n' cat -n `basename $0` # The difference is that 'cat -n' numbers the blank lines. # Note that 'nl -ba' will also do so. exit 0 pr Print formatting filter. This will paginate files (or stdout) into sections suitable for hard copy printing or viewing on screen. Various options permit row and column manipulation, joining lines, setting margins, numbering lines, adding page headers, and merging files, among other things. The pr command combines much of the functionality of nl, paste, fold, column, and expand.

E_BADARGS=65 if [ -z "$1" ] # Check for argument to script. then echo "Usage: `basename $0` pattern" exit $E_BADARGS fi echo for file in * # Traverse all files in $PWD. do output=$(sed -n /"$1"/p $file) # Command substitution. if [ ! -z "$output" ] # What happens if "$output" is not quoted? then echo -n "$file: " echo $output fi # sed -ne "/$1/s|^|${file}: |p" is equivalent to above. html (9 of 19) [7/15/2002 6:33:48 PM] Text Processing Commands done echo exit 0 # # # # Exercises: --------1) Add newlines to output, if more than one match in any given file.

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