메모하는 습관

linux 서버 용량 점검

용량 KB/MB/GB 표기

 ls -alh
total 40
drwxr-xr-x  10 jongpillee  staff   320B Sep 28 16:25 .
drwxr-xr-x+ 62 jongpillee  staff   1.9K Oct  6 14:28 ..
drwxr-xr-x   4 jongpillee  staff   128B Jul 26 13:54 Career
drwxr-xr-x  15 jongpillee  staff   480B Oct  6 14:24 Develop
drwxr-xr-x   3 jongpillee  staff    96B Jul 26 14:00 Doc
-rw-r--r--@  1 jongpillee  staff   4.2K Sep  1 16:07 Untitled 1.md
-rw-r--r--@  1 jongpillee  staff   2.5K Sep 28 16:25 Untitled 2.md
drwxr-xr-x   5 jongpillee  staff   160B Aug  8 09:40 Work
-rw-r--r--@  1 jongpillee  staff   2.4K Aug 19 13:58 사이판.md

folder, file 용량 조회

 du -hs \MD
300K    MD/

 du -hs \MD/*
8.0K    MD/Career
128K    MD/Develop
 12K    MD/Doc
8.0K    MD/Untitled 1.md
4.0K    MD/Untitled 2.md
132K    MD/Work
4.0K    MD/사이판.md

file disk 용량

 df -h
Filesystem       Size   Used  Avail Capacity iused      ifree %iused  Mounted on
/dev/disk1s1s1  932Gi   22Gi  691Gi     4%  501138 4292962242    0%   /
devfs           190Ki  190Ki    0Bi   100%     656          0  100%   /dev
/dev/disk1s5    932Gi  8.0Gi  691Gi     2%       8 7247238840    0%   /System/Volumes/VM
/dev/disk1s3    932Gi  372Mi  691Gi     1%    2218 7247238840    0%   /System/Volumes/Preboot
/dev/disk1s6    932Gi  104Mi  691Gi     1%     469 7247238840    0%   /System/Volumes/Update
/dev/disk1s2    932Gi  209Gi  691Gi    24% 1220863 7247238840    0%   /System/Volumes/Data
map auto_home     0Bi    0Bi    0Bi   100%       0          0  100%   /System/Volumes/Data/home
/dev/disk1s1    932Gi   22Gi  691Gi     4%  502070 4292614026    0%   /System/Volumes/Update/mnt1    

WAS thread dump Script

```
#!/bin/bash
export pidlist=`ps -ef | grep tomcat.server | awk '{print $2}'`

date=`date + %m%d`
export LOG_DIR=/app/logs/threaddump/$date
echo "LOG_DIR = " $LOG_DIR

if [! -d $LOG_DIR ]; then
    mkdir $LOG_DIR
fi
echo "LOG_DIR making success!! "

nowtime=`date +%H:%M`
echo "nowdate=" $nowtime

ps -ef | grep tomcat.server | awk '{print $2,$9}' >> /app/logs/threaddump/$date/pidname.txt

echo "thread dump start....."

for PID in $pidlist ;do
/app/jdk/jdk1.8.0_89/bin/jstack -1 $PID >> /app/logs/threaddump/$date/${PID}_ThreadDump-1.log
echo "first thread dump ....."
done
sleep 3
echo "first thread dump success....."

for PID in $pidlist ;do
/app/jdk/jdk1.8.0_89/bin/jstack -1 $PID >> /app/logs/threaddump/$date/${PID}_ThreadDump-2.log
echo "second thread dump ....."
done
sleep 3
echo "second thread dump success....."

for PID in $pidlist ;do
/app/jdk/jdk1.8.0_89/bin/jstack -1 $PID >> /app/logs/threaddump/$date/${PID}_ThreadDump-3.log
echo "third thread dump ....."
done
sleep 3
echo "third thread dump success....."
```

리눅스 명령어

cp 파일 복사 하기

cp {옵션} {폴더} {복사할 폴더}
cp -r  static-root/\* /home/admin/mc\_20200106

scp 원격 간 파일 전송

scp {옵션} {폴더} {접속계정}@{목적지IP}:/{복사할 폴더}
scp  -r ./static-root/* admin@111.222.26.777:/mall_nas/static-root/  // static-root 전체 파일을 mall_nas 폴더 하위로 전송

tail (log 확인)

tail -f catalina.out //실시간 로그 확인
tail -f catalina.out | grep "ERROR" //error 만 캐치
tail -f catalina.out | grep "ERROR" | wc -l //error 카운트
tail -n 2000 catalina.out //마지막 끝에서 2000 라인까지

파일 삭제

rm -f //file
rm -r //folder ex)-rf

세션 클러스터 설정 참고 블로그

링크 이동

Tomcat error

Caused by: java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'socialController' bean method

톰켓 Console에서 위와 같은 오류가 발생한 경험이 있다.

알고 보니 두개에 Controller에서 동일한 URL 맵핑으로 method가 정의 되어 있어서 발생하는 경우 이다.

-homeController.java

@RequestMapping(value = "/facebook/posting") 
public void postings(String message , String accessToken, HttpServletRequest request, HttpServletResponse response)  

-socialController.java

@RequestMapping(value = "/posting") 
public void posting(String message, String accessToken, HttpServletRequest request, HttpServletResponse response) 

한곳의 Request Mapping을 변경하면 해결 된다.