• 用shell 批次改檔名
  • 此用法應用到 for in , 正規表示法, awk , sed 因此還學滿多的

    #!/bin/sh
    cd ~/test2
    echo `pwd`
    for i in *.[tT][iI][fF]; do
            #若目錄內無 .tif 檔案 $i 會傳回 "*.[tT][iI][fF]"
            if [ "$i" != "*.[tT][iI][fF]" ]; then
                    #取得副檔名
                    subname="`echo $i | awk -F '.' '{print $NF}'`"
                    #取得主檔名
                    filename="`echo $i | sed -e s/\.${subname}//`"
                    #將 .tif 轉成 .pdf
                    #tiff2pdf -o "${filename}.pdf" "$i"
                    echo "tif -> pdf"
                    mv ${filename}.${subname} ${filename}.pdf
                    #若執行成功則刪除 .tif 檔案
                    if [ $? -eq 0 ]; then
                            rm -rf $i
                    fi
            fi
    done
    

• awk

  Examples:
  	gawk '{ sum += $1 }; END { print sum }' file
  	gawk -F: '{ print $1 }' /etc/passwd
  

• sed

  Usage: sed [OPTION]... {script-only-if-no-other-script} [input-file]...
    -n, --quiet, --silent
                  suppress automatic printing of pattern space
    -e script, --expression=script
                   add the script to the commands to be executed