Tech C**P
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مدرس و برنامه نویس پایتون و لینوکس @alirezastack
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Remove all stopped containers.
docker rm $(docker ps -a -q)

#docker #rm #ps
Did you push a very large file into git? Does everyone yell at you about your commit and your uselessness? Are you a junky punky like me that just ruin things? Oh I'm kidding...

Because of that big file cloning the repo again would take a long long time. Removing the file locally and pushing again would not solve the problem as that big file is in Git's history.

If you want to remove the large file from your git history, so that when everyone clone the repo should not wait for that large file, just do as follow:

git filter-branch --tree-filter 'rm path/to/your/bigfile' HEAD

git push origin master --force

I should note that you should be in the root of git repo.

If you need to do this, be sure to keep a copy of your repo around in case something goes wrong.

#git #clone #rm #remove #large_file #blob #rebase #filter_branch
Delete files older than X days. You can use find command in order to find files with specific patterns in a specific directory and then remove those files:

BACKUP_DIR=/var/backup

# Number of days to keep backups
KEEP_BACKUPS_FOR=30 #days

find $BACKUP_DIR -type f -name "*.sql.gz" -mtime +$KEEP_BACKUPS_FOR -exec rm {} \;

-mtime n[smhdw]:
If no units are specified, this primary evaluates to true if the difference between the file last modification time and the time find was started, rounded up to the next full 24-hour period, is n 24-hour periods.

-exec utility [argument ...] ;
True if the program named utility returns a zero value as its exit status. Optional arguments may be passed to the utility. The expression must be terminated by a semicolon (``;''). If you invoke find from a shell you may need to quote the semicolon if the shell would otherwise treat it as a control operator. If the string ``{}'' appears anywhere in the utility name or the arguments it is replaced by the pathname of the current file. Utility will be executed from the directory from which find was executed. Utility and arguments are not subject to the further expansion of shell patterns and constructs. SO BECAREFUL SEMICOLON IS NEEDED!

#find #rm #exec #mtime #remove_old_files #remove