标题：Linux Cut命令基本用法，grep INCREMENTAL_STEP /backup/3306/cycle_file | cut -d= -f2,-d后面就是分割符，砍甘蔗。
出处：向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
时间：Thu, 22 Jun 2017 23:53:48 +0000
作者：jackxiang
地址：http://jackxiang.com/post/9207/

内容：
save_cycle_data || { echo 'save cycle data failed' && exit 1; }  #调用函数失败的写法
basedir=$(cd "$(dirname "$0")";pwd)
echo $basedir

cat /backup/3306/cycle_file 
BASE_ID=base-2018-06-11-1203
INCREMENTAL_STEP=20534973839
LAST_LSN=2
获取到等号后面的位置：

grep INCREMENTAL_STEP /backup/3306/cycle_file | cut -d= -f2
20534973839

grep BASE_ID /backup/3306/cycle_file| cut -d= -f2
base-2018-06-11-1203

grep LAST_LSN /backup/3306/cycle_file | cut -d= -f2
2


获取INNODB的Last checkpoint at:

mysql -e 'show engine innodb status\G'|grep 'Last checkpoint at'|awk '{print $NF}';
20544229853
[root@baige_mysql_bj_sjs_10_71_183_144 mysql_xtrabackup]# mysql -e 'show engine innodb status\G'
Log sequence number 20547216141
Log flushed up to   20547215666
Pages flushed up to 20544229853
Last checkpoint at  20544229853


参数之f3,砍断后第三节，如下：

$git branch -a|grep -v "*" | grep -v ">"
  master
  remotes/origin/dev
  remotes/origin/master


Cut上来：

$git branch -a|grep -v "*" | grep -v ">"|cut -d "/" -f3
  master
dev
master



sed 去空格和Tab：

git branch -a|grep -v "*" | grep -v ">"|cut -d "/" -f3|sed "s/^[ \t]*//g"



去掉重复行：

$git branch -a|grep -v "*" | grep -v ">"|cut -d "/" -f3|sed "s/^[ \t]*//g"
master
dev
master



按正顺序sort:(反着排序 -r)

$git branch -a|grep -v "*" | grep -v ">"|cut -d "/" -f3|sed "s/^[ \t]*//g"|sort
dev
master
master



uniq上来去重：

git branch -a|grep -v "*" | grep -v ">"|cut -d "/" -f3|sed "s/^[ \t]*//g"|sort|uniq



防止太多，限制10条，head -10上来：

git branch -a|grep -v "*" | grep -v ">"|cut -d "/" -f3|sed "s/^[ \t]*//g"|sort|uniq|head -10




当然，还有更简单的，不用git branch -a:
主要是了解命令：

$git branch |sed "s# ##g"|sed "s#*##"
dev
master

addr:You have new mail in /var/spool/mail/root





Generated by Jackxiang's Bo-blog 2.1.1 Release