shell命令以及bash脚本记录

女爷i 2022-10-09 00:38 179阅读 0赞

1、sed "s/$//"的使用  
s 替换指定字符

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# ls
    1.txt  2.txt  3.txt  envsetup.sh
    root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# ls *.txt | sed "s/.txt$//"
    1
    2
    3
    root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# ls
    1.txt  2.txt  3.txt  envsetup.sh
    root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# ls *.txt | sed "s/$//"
    1.txt
    2.txt
    3.txt

2、shell命令获取数组长度

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# ls
    1.txt  2.txt  3.txt  envsetup.sh
    root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# DIR_ARRY=($(ls *.txt|sed "s/$//"|sort))
    root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# DIR_ARRY_LEN=${ #DIR_ARRY[@]}
    root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# echo $DIR_ARRY_LEN
    3

3、bash脚本记录

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# vim kwt.sh

#!/bin/bash
    echo No available configs${ 1:+" for: $1"}

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# source kwt.sh kwtkwt
    No available configs for: kwtkwt
    root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# source kwt.sh
    No available configs

4、xargs和sed "="的使用  
(1)、xargs的使用：

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# ls
    1.txt  2.txt  3.txt  envsetup.sh  kwt.sh
    root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# vim kwt.sh

#!/bin/bash
    DIR_ARRY=($(ls *.txt|sed "s/$//"|grep "$1" |sort))
    DIR_ARRY_LEN=${ #DIR_ARRY[@]}
    echo ${ DIR_ARRY[@]} | xargs -n 1
    #echo ${ DIR_ARRY[@]} | xargs -n 2
    #echo ${ DIR_ARRY[@]} | xargs -n 1 | sed "="
    #echo ${ DIR_ARRY[@]} | xargs -n 1 | sed "=" | sed "N;s/\n/. /"

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# source kwt.sh
    1.txt
    2.txt
    3.txt

修改成如下：

#!/bin/bash
    DIR_ARRY=($(ls *.txt|sed "s/$//"|grep "$1" |sort))
    DIR_ARRY_LEN=${ #DIR_ARRY[@]}
    #echo ${ DIR_ARRY[@]} | xargs -n 1
    echo ${ DIR_ARRY[@]} | xargs -n 2
    #echo ${ DIR_ARRY[@]} | xargs -n 1 | sed "="
    #echo ${ DIR_ARRY[@]} | xargs -n 1 | sed "=" | sed "N;s/\n/. /"

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# source kwt.sh
    1.txt 2.txt
    3.txt

(1)、sed "="的使用：

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# ls
    1.txt  2.txt  3.txt  envsetup.sh  kwt.sh
    root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# vim kwt.sh

#!/bin/bash
    DIR_ARRY=($(ls *.txt|sed "s/$//"|grep "$1" |sort))
    DIR_ARRY_LEN=${ #DIR_ARRY[@]}
    echo ${ DIR_ARRY[@]} | xargs -n 1 | sed "="
    #echo ${ DIR_ARRY[@]} | xargs -n 1 | sed "=" | sed "N;s/\n/. /"

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# source kwt.sh
    1
    1.txt
    2
    2.txt
    3
    3.txt

修改成如下：

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# ls
    1.txt  2.txt  3.txt  envsetup.sh  kwt.sh
    root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# vim kwt.sh

#!/bin/bash
    DIR_ARRY=($(ls *.txt|sed "s/$//"|grep "$1" |sort))
    DIR_ARRY_LEN=${ #DIR_ARRY[@]}
    #echo ${ DIR_ARRY[@]} | xargs -n 1 | sed "="
    echo ${ DIR_ARRY[@]} | xargs -n 1 | sed "=" | sed "N;s/\n/. /"

root@kongwt-virtual-machine:/mnt/hgfs/VMware/kwt# source kwt.sh
    1. 1.txt
    2. 2.txt
    3. 3.txt