When no any Linux command working

Type & Enter

PATH=/usr/local/bin:/usr/bin:$PATH

Recursively remove files

find / -name *SQLkeep_j.conf* -type f -delete

get the size of sub directories

du -sh -- *

or

du -sh /*

Copy files to docker & vice versa

docker cp foo.txt mycontainer:/foo.txt

docker cp mycontainer:/foo.txt foo.txt

wso2esb import certs

Import 

keytool -import -alias mdpCert -file /tmp/_.smart.com.kh -keystore clientTrustore.jks -storepass wso2carbon

List

keytool -list -v -keystore wso2carbon.jks -alias mdpCert

Delete certs

keytool -delete -alias mdpCert -keystore wso2carbon.jks