Shell按行读取文件的方法有很多,常见的三种方法如下:
要读取的文件:
1 [root@mini05 20180930-2]# cat file.info
2 111
3 222
4 333 444
5 555 666
写法一:
1 [root@mini05 20180930-2]# cat read1.sh
2 #!/bin/bash
3 ################ Version Info ##################
4 # Create Date: 2018-09-29
5 # Author: zhang
6 # Mail: zhang@xxx.com
7 # Version: 1.0
8 # Attention: 按行读取文件
9 ################################################
10
11 # 加载环境变量
12 . /etc/profile
13 . ~/.bash_profile
14 . /etc/bashrc
15
16 # 脚本所在目录及脚本名称
17 script_dir=$( cd "$( dirname "$0" )" && pwd )
18 script_name=$(basename ${0})
19
20 exec < ${script_dir}/file.info
21 while read line; do
22 echo "${line}"
23 done
写法二:
1 [root@mini05 20180930-2]# cat read2.sh
2 #!/bin/bash
3 ################ Version Info ##################
4 # Create Date: 2018-09-29
5 # Author: zhang
6 # Mail: zhang@xxx.com
7 # Version: 1.0
8 # Attention: 按行读取文件
9 ################################################
10
11 # 加载环境变量
12 . /etc/profile
13 . ~/.bash_profile
14 . /etc/bashrc
15
16 # 脚本所在目录及脚本名称
17 script_dir=$( cd "$( dirname "$0" )" && pwd )
18 script_name=$(basename ${0})
19
20 cat ${script_dir}/file.info | while read line;do
21 echo "${line}"
22 done
写法三:
1 [root@mini05 20180930-2]# cat read3.sh
2 #!/bin/bash
3 ################ Version Info ##################
4 # Create Date: 2018-09-29
5 # Author: zhang
6 # Mail: zhang@xxx.com
7 # Version: 1.0
8 # Attention: 按行读取文件
9 ################################################
10
11 # 加载环境变量
12 . /etc/profile
13 . ~/.bash_profile
14 . /etc/bashrc
15
16 # 脚本所在目录及脚本名称
17 script_dir=$( cd "$( dirname "$0" )" && pwd )
18 script_name=$(basename ${0})
19
20 while read line; do
21 echo "${line}"
22 done < ${script_dir}/file.info