linux-日常工作积累

修改系统时间,同步网络时间,修改时区:

https://www.cnblogs.com/suiyueshentou/p/7798340.html

https://my.oschina.net/qiongtaoli/blog/2051844

VMware虚拟机 Linux系统 Ubuntu 16.04 硬盘/磁盘扩容:

https://blog.csdn.net/m0_43403238/article/details/85480314?utm_medium=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.control&depth_1-utm_source=distribute.pc_relevant_t0.none-task-blog-BlogCommendFromMachineLearnPai2-1.control

Clion on Ubuntu14.04, 无法使用Navigate中的Back命令的快捷键Ctrl+Alt+Left

https://segmentfault.com/q/1010000005040615

 

Linux 命令神器:lsof

https://www.jianshu.com/p/a3aa6b01b2e1

产生core文件:  ulimit -c unlimited   

基于gdb调试:gdb xx(如media-agent这是编译后的可执行文件) core,进入调试状态

         gdb bt  可以看到比如coredump报错出现的问题,比如空指针,野指针,内存泄露

         gdb f 1/2/3/4...

       

 nohup 后台运行,进程查看以及终止https://www.cnblogs.com/baby123/p/6477429.html

Linux MemFree与MemAvailable的区别

https://blog.51cto.com/xujpxm/1961072

linux命令行/shell 查看实时网速

LANG=""
while true
do
    up_time1=`ifconfig $1 | grep "bytes" | awk '{print $6}'`
    down_time1=`ifconfig $1 | grep "bytes" | awk '{print $2}'`
    
    sleep 1
    clear
    
    up_time2=`ifconfig $1 | grep "bytes" | awk '{print $6}'`
    down_time2=`ifconfig $1 | grep "bytes" | awk '{print $2}'`
    
    up_time1=${up_time1}
    up_time2=${up_time2}
    down_time1=${down_time1}
    down_time2=${down_time2}
    
    up_time=`expr $up_time2 - $up_time1`
    down_time=`expr $down_time2 - $down_time1`
    up_time=`expr $up_time / 1024`
    down_time=`expr $down_time / 1024`
    
    echo 上传速度: $up_time kb/s
    echo 下载速度: $down_time kb/s
done
原文地址:https://www.cnblogs.com/kongweisi/p/14109853.html