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timeout 3 sleep 30 当 sleep 执行 3 秒的时候就会终止 包裹程序未超时,timeout传递退出代码(--preserve-status)(亲测似乎不加此选项也会保护退出代码) timeout --preserve-status 1m ping -c 5 Nostromo.local echo $? # 如果timeout包裹的程序超时,则返回值为124,否则为未超...

无下标控制,类似range-for array=(hello word) for element in $array do echo $element done 下标:`$

i=1 # in loop body i=`expr $i + 1`

一维 line=`cat syntest.sh | wc -l` echo $line 多维:返回数组 fnames=`ls testcase/functional | grep .sy` for fname in ${fnames[@]} do echo $fname done

if diff test.sh syntest.sh > tmpout; then # diff比较如果相同则返回0,则会if条件成立走上面的分支 echo "same." else echo "different." fi rm -rf tmpout

打开文件的进程定位到打开的进程 lsof <file> $ lsof /opt/mysql/data/5690/mysql-error.log COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME mysqld 12858 actiontech-universe 1w ...

https://blog.csdn.net/qq_29007291/article/details/84953671

旧服务器备份:把~/.halo压缩 tar -zvcf ~/.halo.tar.gz ~/.halo # 得到~/.halo.tar.gz 移到新服务器中在旧服务器上运行 scp ~/.halo.tar.gz <新服务器用户名>@<新服务器ip地址>:~/.halo.tar.gz #scp即secure copy,是用来进行远程文件拷贝的。数据传输...

重定向https://stackoverflow.com/questions/47719965/how-to-redirect-stdout-to-a-file-and-then-restore-stdout-back 举例#include <iostream> #include <unistd.h> #include <fcntl.h> using na...

参考教程https://terminalroot.com/how-to-hide-input-via-cli-with-cpp/?ref=morioh.com&utm_source=morioh.com man信息#include <termios.h>https://pubs.opengroup.org/onlinepubs/7908799/xsh/termios.h....