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# Linux Memcached Installation Memcached supports many platforms: Linux, FreeBSD, Solaris, Mac OS, and can also be installed on Windows. To install Memcached on a Linux system, you first need to install the libevent library. sudo apt-get install libevent libevent-dev (Automatic download and installation for Ubuntu/Debian) yum install libevent libevent-devel (Automatic download and installation for Redhat/Fedora/Centos) * * * ## Installing Memcached ### Automatic Installation **Ubuntu/Debian** sudo apt-get install memcached **Redhat/Fedora/Centos** yum install memcached **FreeBSD** portmaster databases/memcached After installation, you can use `whereis` to check the command path: whereis memcached The installation location is found to be **/usr/bin/memcached**. ### Source Code Installation Download the latest version of Memcached from its official website (http://memcached.org). wget http://memcached.org/latest (Download the latest version) tar -zxvf memcached-1.x.x.tar.gz (Extract the source code) cd memcached-1.x.x (Enter the directory) ./configure --prefix=/usr/local/memcached (Configure) make && make test (Compile) sudo make install (Install) * * * ## Running Memcached Running the Memcached command: $ /usr/local/memcached/bin/memcached -h (Command help) Note: If installed automatically, the memcached command is located at **/usr/local/bin/memcached**. **Startup Options:** * `-d` is to start a daemon process; * `-m` is the amount of memory allocated for Memcache, in MB; * `-u` is the user to run Memcache as; * `-l` is the IP address of the server to listen on, multiple addresses are allowed; * `-p` is the port for Memcache to listen on, preferably above 1024; * `-c` is the maximum number of concurrent connections, default is 1024; * `-P` is to set the pid file for saving Memcache's process ID. ### (1) Running as a foreground program: Enter the following command in the terminal to start memcached: /usr/local/memcached/bin/memcached -p 11211 -m 64m -vv slab class 1: chunk size 88 perslab 11915 slab class 2: chunk size 112 perslab 9362 slab class 3: chunk size 144 perslab 7281 ... (omitted) slab class 38: chunk size 391224 perslab 2 slab class 39: chunk size 489032 perslab 2 <23 server listening <24 send buffer was 110592, now 268435456 <24 server listening (udp) <24 server listening (udp) <24 server listening (udp) <24 server listening (udp) This displays debug information. This starts memcached in the foreground, listening on TCP port 11211, with a maximum memory usage of 64M. Most of the debug information is about storage. ### (2) Running as a background service: # /usr/local/memcached/bin/memcached -p 11211 -m 64m -d Or /usr/local/memcached/bin/memcached -d -m 64M -u root -l 192.168.0.200 -p 11211 -c 256 -P /tmp/memcached.pid AI is thinking... [](#)(#) (#)[](#)