遍历目录查找内容
grep -rnw '/path/to/somewhere/' -e 'pattern'-r或-R表示遍历-n显示行号-w全文匹配-l（小写 L） 只显示文件名-e匹配的表达式
参考：How do I find all files containing specific text on Linux? – Stack Overflow
复制多个目录
cp -r d1 d2 d-* dist/查找磁盘占用
ubuntu@VM-16-15-ubuntu:~$ sudo du -h --max-depth=1 /var/lib/docker/volumes | sort -h
8.0K /var/lib/docker/volumes/7e6264b4649948452587e6b562dae6a5881d17ba0254eefb6a98e32dae35f593
8.0K /var/lib/docker/volumes/e3a990377c6c214dd7b8c45807c8f63319988b2a29c4e58d13c0445da3e2e7d5
8.0K /var/lib/docker/volumes/sentry-self-hosted_sentry-kafka-log
8.0K /var/lib/docker/volumes/sentry-self-hosted_sentry-secrets
12K /var/lib/docker/volumes/373a3159029b89230c64a7dc74633a48f29fa5a10dd7fee57a16318d659e76a7
12K /var/lib/docker/volumes/sentry-self-hosted_sentry-smtp-log
28K /var/lib/docker/volumes/sentry-self-hosted_sentry-nginx-cache
36K /var/lib/docker/volumes/sentry-symbolicator
92K /var/lib/docker/volumes/sentry-self-hosted_sentry-smtp
144K /var/lib/docker/volumes/sentry-self-hosted_sentry-zookeeper-log
368K /var/lib/docker/volumes/sentry-zookeeper
712K /var/lib/docker/volumes/sentry-data
1.8M /var/lib/docker/volumes/sentry-redis
814M /var/lib/docker/volumes/sentry-self-hosted_sentry-clickhouse-log
1.6G /var/lib/docker/volumes/sentry-clickhouse
14G /var/lib/docker/volumes/sentry-postgres
16G /var/lib/docker/volumes/sentry-kafka
31G /var/lib/docker/volumes