basename和dirname工具
basename截取文件路径中的文件名
1 2 | [root@ggpscripts] #basename/root/scripts/birds/regular_express.txt regular_express.txt |
dirname截取文件路径中的文件路径
1 2 | [root@ggpscripts] #dirname/root/scripts/birds/regular_express.txt /root/scripts/birds |
不使用外部工具进行字符截断
#去除从开头匹配成功的最短字符串
##去除从开头匹配成功的最长字符串
%去除从结尾匹配成功的最短字符串
%%去除从结尾匹配成功的最长字符串
*通配符
1 2 3 4 5 6 7 8 9 | [root@ggpscripts] #string=www.baidu.com [root@ggpscripts] #echo${string#*.} baidu.com [root@ggpscripts] #echo${string##*.} com [root@ggpscripts] #echo${string%.*} www.baidu [root@ggpscripts] #echo${string%%.*} www |
截取文件名:
1 2 3 | [root@ggpscripts] #dir=/root/scripts/birds/regular_express.txt [root@ggpscripts] #echo${dir##*/} regular_express.txt |
截取文件路径:
1 2 3 | [root@ggpscripts] #dir=/root/scripts/birds/regular_express.txt [root@ggpscripts] #echo${dir%/*} /root/scripts/birds |