shell命令基本操作1

1. sed指定行插入: sed -i “i” 或者"a"
2. 插入列paste 或者awk
   http://bbs.chinaunix.net/thread-342540-1-1.html
3. shell定义函数func(){ 函数体 }
4. shell算术运算： ((c=$a+$b))
   http://c.biancheng.net/view/2480.html
5. sed打印匹配行号: sed -n -e ‘/match_string/=’
6. awk打印多列: awk -F ‘:’ ‘{print $1"t"$(NF-1)}’ file
7. shell读取行

while read line
do
    echo $line
done < test.txt

8. 读取行:head, tail, cat, sed
9. vim切换文件: bn,bp
10. pandas插入列： df.insert(loc=len(df.columns), column=‘Player’, value=player_vals)或者d[‘player’] = value_list
11. pandas插入行: loc或者append方法
12. 创建空的dataframe: df_empty = pd.DataFrame(columns=[‘A’, ‘B’])