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Changing MongoDB data store directory
... start
# test if mongodb user can access new location:
sudo -u mongodb -s cd /new/disk/mongodb/
# resolve other permissions issues if necessary
sudo usermod -a -G <newdisk_grp> mongodb
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Deleting all pending tasks in celery / rabbitmq
...eryev.c66a9bed-84bd-40b0-8fe7-4e4d0c002866 0 1
celeryev.b490f71a-be1a-4cd8-ae17-06a713cc2a99 0 1
celeryev.9d023165-ab4a-42cb-86f8-90294b80bd1e 0 1
The first column is the queue name, the second is the number of messages waiting in the queue, and the third is the number of listeners for...
How do I increase the scrollback buffer in a running screen session?
...What you need to know is if the file is not created ! You create it !
> cd ~ && vim .screenrc
And you add defscrollback 1000000 to it!
Or in one command
> echo "defscrollback 1000000" >> .screenrc
(if not created already)
Taking effect
When you add the default to .screenrc! The...
How to clone git repository with specific revision/changeset?
...
$ git clone $URL
$ cd $PROJECT_NAME
$ git reset --hard $SHA1
To again go back to the most recent commit
$ git pull
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ERROR 1396 (HY000): Operation CREATE USER failed for 'jack'@'localhost'
...te jack)
CREATE USER 'jack'@'localhost' IDENTIFIED BY PASSWORD '*Fi47ytFF3CD5B14E7EjkjkkC1D3F8086A5C0-krn';
(Get out of this situation by running DROP USER)
DROP USER 'jack'@'localhost';
(I suppose FLUSH PRIVILEGES can't hurt, but definitely drop the user first.)
...
How to find the largest file in a directory and its subdirectories?
...| sort -n -r | head -n 10
If you want more human readable output try:
$ cd /path/to/some/var
$ du -hsx * | sort -rh | head -10
Where,
Var is the directory you wan to search
du command -h option : display sizes in human readable format (e.g.,
1K, 234M, 2G).
du command -s option : show only a ...
How to revert a merge commit that's already pushed to remote branch?
...efore the wrong commit) from git log
git log -n5
output:
commit 7cd42475d6f95f5896b6f02e902efab0b70e8038 "Merge branch 'wrong-commit' into 'development'"
commit f9a734f8f44b0b37ccea769b9a2fd774c0f0c012 "this is a wrong commit"
commit 3779ab50e72908da92d2cfcd72256d7a09f446ba "this is ...
How to get the home directory in Python?
...
Here is a linux way cd .. if you need to use that instead note:(if you are in a sub directory then it will take to the directory)
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impro...
Argument list too long error for rm, cp, mv commands
...s the commands in batches. For instance to delete the files 100 at a time, cd into the directory and run this:
echo *.pdf | xargs -n 100 rm
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How to amend several commits in Git to change author
...re clone of your repo
git clone --bare https://github.com/user/repo.git
cd repo
Edit the following script (replacing OLD_EMAIL, CORRECT_EMAIL, and CORRECT_NAME)
#!/bin/sh
git filter-branch --env-filter '
OLD_EMAIL="your-old-email@example.com"
CORRECT_NAME="Your Correct Name"
CORRECT_EMAIL="...