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 find a class in a Jar file
Answer:
To find a class file in a given Java Jar file, e.g. to find the class "KeyToken" in the file "selenium-server-standalone.jar",
# jar -tf selenium-server-standalone.jar | grep KeyToken
org/yaml/snakeyaml/tokens/KeyToken.classHow to ignore error in Bash script
Answer:
We have learned in the past on how to show the exit status of a given command.
But is it possible ignore the error and return normal exit code even the command has failed?
Yes, pipe "|| true" to the end of command, e.g.
# foo || true
-bash: foo: command not found
# echo $?
0As you can see even the command foo was not found, our last exit code is still zero.
How to delete a branch in Git
Answer:
Assume you have a branch called "feature1", and you want to delete it locally, you can use:
# git branch -d feature1
How to check Mac OS version from command
Answer:
To check the Mac OS version, it is easy with the following command.
# defaults read loginwindow SystemVersionStampAsString
10.7.3Show hidden files in Mac OSX
Answer:
To show all the files in Finder, you can open the terminal and type:
defaults write com.apple.finder AppleShowAllFiles TRUE
Then restart Finder
killall Finder
