How To
links
ln -s existingDir newDir
alternatives
Choose default from different installed JREs
sudo update-alternatives --config java
Find path a program is installed in
where program
Shell variables
| Variable | Meaning |
|---|---|
| !$ | last argument of last command |
| !! | last command, e.g. sudo !! |
| $? | exit code of last run program |
lame scripting tricks
ZSHs .history under Dropbox
History is saved in a folder, which is sync'ed via Dropbox-Service, local .history is a symlink to that file:
cp .history .history.bak; mv .history Dropbox/ && ln -s Dropbox/.history .history
short form for if constructs
[[ condition ]] && doSmthIfConditionIsTrue;
