1. file
file DB_LINK.sql
output
DB_LINK.sql: ASCII text, with CRLF line terminators
2. iconv
iconv -f cp936 -t utf-8 DB_LINK.sql -o DB_LINK_utf-8.sql
3. dos2unix
convert dos fromat to unix format sudo apt-get install dos2unix -y
4. convert all files into anoter format under current folder
for file in *.sql; do
iconv -f cp936 -t utf-8 "$file" -o "${file%}"
done
5. Background
Before running the command, you can append & to the command line to run in the background:
long-running-command &
After starting a command, you can press CtrlZ to suspend it, and then bg to put it in the background:
long-running-command
[Ctrl+Z]
bg
6. Port
netstat netstat -tunlp 用于显示 tcp，udp 的端口和进程等相关情况。
netstat 查看端口占用语法格式：
netstat -tunlp | grep 端口号
- -t (tcp) 仅显示tcp相关选项
- -u (udp)仅显示udp相关选项
- -n 拒绝显示别名，能显示数字的全部转化为数字
- -l 仅列出在Listen(监听)的服务状态
- -p 显示建立相关链接的程序名
6. Search text content
find . -name "*.c" -print | xargs grep "main"
7. Seearch process
PID=$(ps -ef | grep tos.jar | grep -v grep | awk '{ print $2 }')
if [ -z "$PID" ]
then
echo Application is already stopped
else
echo kill $PID
kill -9 $PID
fi
8 show process details
ps -p {pid} -lF
/proc/{PID}
#9 信息摘要
sha256sum file.zip > file.sha256
sha256sum -c file.sha256 (注意：摘要的文件名与被校验的文件名要一致)