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Ubuntu says “bash: ./program Permission denied” [closed]
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chmod u+x program_name. Then execute it.
If that does not work, copy the program from the USB device to a native volume on the system. Then chmod u+x program_name on the local copy and execute that.
Unix and Unix-like systems generally will not ex...
Android Studio Editor Font Sizing
... This is terrible UX. I would generally expect to edit something then save it. Thank you for explaining pat IntelliJ's poor UX.
– Owen Blacker
Mar 3 '15 at 16:52
1
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Can a shell script set environment variables of the calling shell? [duplicate]
...uld be at the top. Just stating the obvious.. if the script is in your PWD then it has the form of dot space dot eg . ./localscript.sh
– Max Robbertze
Jul 27 '16 at 9:02
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Insert auto increment primary key to existing table
...anks. my bad. The green mark is for you since yours is easier to implement then. :D
– FlyingCat
Jan 30 '12 at 21:24
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How to recover stashed uncommitted changes
...s git stash apply
Just check out the branch you want your changes on, and then git stash apply. Then use git diff to see the result.
After you're all done with your changes—the apply looks good and you're sure you don't need the stash any more—then use git stash drop to get rid of it.
I alwa...
Visibility of global variables in imported modules
...t a class, with f as an instance method, rather than just a free function? Then you could do something like this:
import module1
thingy1 = module1.Thingy(a=3)
thingy1.f()
If you really do want a global, but it's just there to be used by module1, set it in that module.
import module1
module1.a=...
PostgreSQL: Show tables in PostgreSQL
...l command line interface,
First, choose your database
\c database_name
Then, this shows all tables in the current schema:
\dt
Programmatically (or from the psql interface too, of course):
SELECT * FROM pg_catalog.pg_tables;
The system tables live in the pg_catalog database.
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Git - How to close commit editor?
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Save the file in the editor. If it's Emacs: CTRLX CTRLS to save then CTRLX CTRLC to quit or if it's vi: :wq
Press esc first to get out from editing. (in windows/vi)
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improve this ...
Cron job every three days
...nt it to run on specific days of the month, like the 1st, 4th, 7th, etc... then you can just have a conditional in your script that checks for the current day of the month.
if (((date('j') - 1) % 3))
exit();
or, as @mario points out, you can use date('k') to get the day of the year instead of ...
How can I rename a database column in a Ruby on Rails migration?
...ration FixColumnName
# creates db/migrate/xxxxxxxxxx_fix_column_name.rb
Then edit the migration to do your will:
# db/migrate/xxxxxxxxxx_fix_column_name.rb
class FixColumnName < ActiveRecord::Migration
def self.up
rename_column :table_name, :old_column, :new_column
end
def self.dow...