실수로 삭제 트리 명령을 복구하는 방법
연구 RPM, 냠 사용
첫째, 명령 트리를 삭제, 트리 명령을 사용할 수 없습니다
[root@centos7 ~]# which tree
/usr/bin/tree
[root@centos7 ~]# rm -f /usr/bin/tree
[root@centos7 ~]# tree .
bash: tree: command not found...둘째, 직접 냠 또는 RPM이 설치되어있는 트리를 설치하라는 메시지가 표시됩니다
[root@centos7 ~]# yum install tree
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: mirror.bit.edu.cn
* extras: mirrors.tuna.tsinghua.edu.cn
* updates: mirrors.tuna.tsinghua.edu.cn
base | 3.6 kB 00:00:00
extras | 3.4 kB 00:00:00
nginx | 2.9 kB 00:00:00
updates | 3.4 kB 00:00:00
Package tree-1.6.0-10.el7.x86_64 already installed and latest version
Nothing to do
[root@centos7 ~]# rpm -ivh /misc/cd/Packages/tree-1.6.0-10.el7.x86_64.rpm
Preparing... ################################# [100%]
package tree-1.6.0-10.el7.x86_64 is already installed셋째, 솔루션 : 필수 범위를 설치
[root@centos7 ~]# rpm --help
--replacepkgs reinstall if the package is already present
[root@centos7 ~]# rpm -ivh /misc/cd/Packages/tree-1.6.0-10.el7.x86_64.rpm --replacepkgs
Preparing... ################################# [100%]
Updating / installing...
1:tree-1.6.0-10.el7 ################################# [100%]넷째, 트리 준비가 이번에는 사용하기
[root@centos7 ~]# tree . -d
.
├── Desktop
├── Documents
├── Downloads
├── Music
├── Pictures
├── Public
├── scripts
├── Templates
└── Videos
9 directories다섯, 냠, 당신은 다시 설치할 수 있습니다
[root@centos7 ~]# yum --help
reinstall reinstall a package
[root@centos7 ~]# rm -f /usr/bin/tree
[root@centos7 ~]# tree -d .
-bash: /usr/bin/tree: No such file or directory
[root@centos7 ~]# yum reinstall tree -y
[root@centos7 ~]# tree -d .
.
├── Desktop
├── Documents
├── Downloads
├── Music
├── Pictures
├── Public
├── scripts
├── Templates
└── Videos
9 directories