一、使用 find 命令直接查找大于指定大小的文件
# 查找当前目录下大于 500MB 的普通文件：find . -type f -size +500M
[root@localhost /]# find . -type f -size +500M ./opt/jumpserver-ce-v4.10.14-x86_64.tar.gz
# 查找并显示详细信息（如大小、权限等）：find /home -type f -size +500M -ls
[root@localhost /]# find /home -type f -size +500M -ls
二、 使用 du 和 sort 找出最大的文件和目录
# 查看当前目录下所有文件和目录的大小，并按大小降序显示前 10 个
du -ah . | sort -rh | head -n 10
[root@localhost /]# du -ah /var | sort -rh | head -n 10 21G /var/lib 21G /var 20G /var/lib/docker/overlay2 20G /var/lib/docker 4.8G /var/lib/docker/overlay2/51b9c81b2a1bfb4b6f36895688e9e99b9cb2fe9e5bacfe071dbab8dca7838562/diff/opt/oracle 4.8G /var/lib/docker/overlay2/51b9c81b2a1bfb4b6f36895688e9e99b9cb2fe9e5bacfe071dbab8dca7838562/diff/opt 4.8G /var/lib/docker/overlay2/51b9c81b2a1bfb4b6f36895688e9e99b9cb2fe9e5bacfe071dbab8dca7838562/diff 4.8G /var/lib/docker/overlay2/51b9c81b2a1bfb4b6f36895688e9e99b9cb2fe9e5bacfe071dbab8dca7838562 4.7G /var/lib/docker/overlay2/51b9c81b2a1bfb4b6f36895688e9e99b9cb2fe9e5bacfe071dbab8dca7838562/diff/opt/oracle/oradata 4.1G /var/lib/docker/overlay2/51b9c81b2a1bfb4b6f36895688e9e99b9cb2fe9e5bacfe071dbab8dca7838562/diff/opt/oracle/oradata/FREE
# 查看根目录下所有一级目录的大小（不深入子目录），并排序
sudo du -sh /* | sort -rh
[root@localhost /]# sudo du -sh /* | sort -rh du: cannot access '/proc/4399/task/4399/fd/4': No such file or directory du: cannot access '/proc/4399/task/4399/fdinfo/4': No such file or directory du: cannot access '/proc/4399/fd/4': No such file or directory du: cannot access '/proc/4399/fdinfo/4': No such file or directory 21G /var 4.7G /usr 2.5G /opt 339M /boot 285M /vulhub 219M /oneterm 108M /data 76M /root 29M /etc 9.4M /run 5.9M /home 16K /tmp 0 /sys
三、结合 find 和 du 查找最大的文件
[root@localhost /]# find / -type f -size +500M -exec du -h {} + | sort -rh | head -20 find: ‘/proc/4608/task/4608/fdinfo/6’: No such file or directory find: ‘/proc/4608/fdinfo/5’: No such file or directory 1.3G /opt/jumpserver-ce-v4.10.14-x86_64.tar.gz 1.1G /var/lib/docker/overlay2/51b9c81b2a1bfb4b6f36895688e9e99b9cb2fe9e5bacfe071dbab8dca7838562/diff/opt/oracle/oradata/FREE/system01.dbf 1.1G /var/lib/docker/overlay2/37e49821a00c0f19a375742837f7319330755fdf0ab0dee1894ed854af50978c/diff/opt/oracle/oradata/FREE/system01.dbf 691M /var/lib/docker/overlay2/51b9c81b2a1bfb4b6f36895688e9e99b9cb2fe9e5bacfe071dbab8dca7838562/diff/opt/oracle/oradata/FREE/sysaux01.dbf 611M /var/lib/docker/overlay2/37e49821a00c0f19a375742837f7319330755fdf0ab0dee1894ed854af50978c/diff/opt/oracle/oradata/FREE/sysaux01.dbf 511M /var/lib/docker/overlay2/df16e9fa86a356b1b4acc46c7a4977d4f6d1862df9efa336d8eb67407a3220ac/diff/opt/oracle/product/26ai/dbhomeFree/bin/oracle 0 /proc/kcore