Commands by batandwa (6)


  • 3
    cat databases.txt | while read db; do docker exec $container_name bash -c "mysqldump -uroot -p\$MYSQL_ROOT_PASSWORD ${db}" | gzip -9 > $HOME/backups/${db}_`date +%Y%m%d_%H%M%S`.sql.gz; done
    batandwa · 2018-09-02 15:23:32 0
  • Creates a git repository in a predefined location. Show Sample Output


    -3
    git-createrepo() { repos_path='/srv/git/'; mkdir $repos_path$1; cd $repos_path$1; git init --bare; echo "Repository location: ssh://[email protected]`cat /etc/HOSTNAME``pwd`"; cd -; }
    batandwa · 2013-05-09 21:44:24 0
  • Watches for file modifications in the current directory and tails the file.


    -4
    watch 'ls -tr1 | tail -n1 | xargs tail'
    batandwa · 2013-05-09 11:37:59 0
  • Monitors the current directory for changes to HAML files and converts them to HTML. Show Sample Output


    0
    while true; do filechanged=$(inotifywait -e close_write,moved_to --format "%w%f" .); haml $filechanged -q --no-escape-attrs > ${filechanged/.haml/.html}; done
    batandwa · 2013-05-01 21:15:26 1

  • 0
    git diff --name-only --diff-filter=AMXTCR HEAD~2 HEAD | xargs -l -I{} cp --parents --verbose "{}" target_dir
    batandwa · 2013-02-11 08:12:40 0

  • 0
    ngrep host 192.168.1.6 -O $(date +%Y%m%d_%H%M%S).pcap > $(date +%Y%m%d_%H%M%S).txt
    batandwa · 2012-10-03 13:09:19 0

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Detect illegal access to kernel space, potentially useful for Meltdown detection
Based on capsule8 agent examples, not rigorously tested

find file/dir by excluding some unwanted dirs and filesystems
Consider using this cmd when: 1. You are planning to traverse a big directory. 2. There is a subdir you don't want find to decend to. (entirely ignore) 3. You don't want find to decend to any mounted filesystems under this dir. * The -xdev flag tells find do not go to other filesystems. * -path ./junk_dir -prune is the pattern to ignore ./junk_dir entirely. * The rest is the typical search and print. To ignore multiple subdirs, you can just iterate the pattern, e.g. find . -path ./junk1 -prune -o -path ./junk2 -prune ... If you do want to include other filesystems, then remove -xdev flag. If you want to search files, then change -type d to -type f.

Set file access control lists
The file myfile is owned by tom and has read and write permissions for tom. Group and other permissions are empty which make myfile readable and writable only by tom. setfacl enables user tom to give read permission to user john only. The command 'ls -l' shows a '+' sign telling us that file access control list has been setup for myfile.

Get AWS temporary credentials ready to export based on a MFA virtual appliance
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Generate an XKCD #936 style 4 word password
The improvement of this command over Strawp's original alternative is that you can specify the size of the words, in this particular case words between 3 and 5 character's long. It also excludes words that contain apostrophes, if you'd rather keep those words simply substitue [^'] for .

Create .pdf from .doc
sudo apt-get install cups-pdf

Change the default editor for modifying the sudoers list.
On Ubuntu, the default editor for visudo is nano. To change the editor to something else (e.g., vi) use this command.

Create/open/use encrypted directory
Create/open/use an encrypted directory encfs needs to be installed During creation easiest to use default values The encrypted files will be in ~/.crypt and you will work as usual in ~/crypt To close the encrypted directory run: fusermount -u ~/crypt When you switch off the computer the encrypted directory will be automatically closed This example uses /home/user/crypt as encrypted directory I use ubuntu linux 8.04 and I am also the creator of www.minihowto.org

Tail a log-file over the network
Netcat is used to serve a log-file over a network on port 1234. Point a browser to the specified server/port combo to view log-file updates in real-time.

Retry the previous command until it exits successfully


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