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How do I extract the contents of an rpm?
... $hdrsize`
EXTRACTOR="dd if=$pkg ibs=$o skip=1"
COMPRESSION=`($EXTRACTOR |file -) 2>/dev/null`
if echo $COMPRESSION |grep -q gzip; then
DECOMPRESSOR=gunzip
elif echo $COMPRESSION |grep -q bzip2; then
DECOMPRESSOR=bunzip2
elif echo $COMPRESSION |grep -iq xz; then # xz and XZ safe
...
Building vs. Compiling (Java)
...this were a C/C++ question.
Short version:
"Compiling" is turning .java files into .class files
'Building" is a generic term that includes compiling and other tasks.
"Building" is a generic term describes the overall process which includes compiling. For example, the build process might inclu...
Warning: mysql_connect(): [2002] No such file or directory (trying to connect via unix:///tmp/mysql.
...
For some reason mysql on OS X gets the locations of the required socket file a bit wrong, but thankfully the solution is as simple as setting up a symbolic link.
You may have a socket (appearing as a zero length file) as /tmp/mysql.sock or /var/mysql/mysql.sock, but one or more apps is looking i...
How to determine SSL cert expiration date from a PEM encoded certificate?
If I have the actual file and a Bash shell in Mac or Linux, how can I query the cert file for when it will expire? Not a web site, but actually the certificate file itself, assuming I have the csr, key, pem and chain files.
...
How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L
...ad the exact same problem and it was driving me crazy!
Put all your hosts file entries for localhost into one line like so:
127.0.0.1 localhost myproject.dev myotherproject.dev
::1 localhost
fe80::1%lo0 localhost
Worked like a charm for me. Seems like a bug in Lion.
...
Should composer.lock be committed to version control?
...
If you update your libs, you want to commit the lockfile too. It basically states that your project is locked to those specific versions of the libs you are using.
If you commit your changes, and someone pulls your code and updates the dependencies, the lockfile should be unm...
Checking Bash exit status of several commands efficiently
...If you invoke ls foo and get an error message of the form ls: foo: No such file or directory\n you understand the problem. If instead you get ls: foo: No such file or directory\nerror with ls\n you become distracted by superfluous information. In this case, It is easy enough to argue that the supe...
ERROR 2003 (HY000): Can't connect to MySQL server on '127.0.0.1' (111)
...r once.
Update
In Step 1, if you cannot find bind-address in the my.cnf file, look for it in /etc/mysql/mysql.conf.d/mysqld.cnf file.
Update in case of MySQL replication enabled
Try to connect MySQL server on IP for which MySQL server is bind in 'my.cnfinstead oflocalhost or 127.0.0.1`.
...
When to use Hadoop, HBase, Hive and Pig?
...e first part of your question, Hadoop is basically 2 things: a Distributed FileSystem (HDFS) + a Computation or Processing framework (MapReduce). Like all other FS, HDFS also provides us storage, but in a fault tolerant manner with high throughput and lower risk of data loss (because of the replicat...
How to load all modules in a folder?
...
List all python (.py) files in the current folder and put them as __all__ variable in __init__.py
from os.path import dirname, basename, isfile, join
import glob
modules = glob.glob(join(dirname(__file__), "*.py"))
__all__ = [ basename(f)[:-3] fo...