Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
How to add a static route using command
Answer:
To add a static route, you can use a simple command like:
# sudo route add 192.168.15.0/24 192.168.1.1
The above command make all request to 192.168.15.0/24 (i.e. 192.168.15.1 to 192.168.15.254) route thru the gateway 192.168.1.1
How to show current routing table
Answer:
To show the current system's routing table, you can try:
# sudo netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 102.147.87.1 0.0.0.0 UG 0 0 0 eth0
0.0.0.0 102.147.45.1 0.0.0.0 UG 0 0 0 eth0
102.147.45.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
102.147.87.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
How to change keystore password using keytool?
Answer:
# keytool -storepasswd -keystore keystore-file
How to check if a RSA key file is valid
Answer:
If you have a RSA key file "test.pem" and want to know if it is a valid RSA key, you can perform a quick check
# openssl rsa -in test.pem -check
unable to load Private Key
21315:error:0906D064:PEM routines:PEM_read_bio:bad base64 decode:/SourceCache/OpenSSL098/OpenSSL098-44/src/crypto/pem/pem_lib.c:763:If it is valid, you will find
# openssl rsa -in test.pem -check
RSA key okHow to restore locally deleted files using git
Answer:
To restore all the locally deleted files (but before commit), you can use the following command:
# git ls-files -d | xargs git checkout --
