What is the bin directory in linux

In Linux, the bin directory is a binary file directory, which contains binary executable files. It mainly places the necessary executable files of the system, such as cat, cp, chmod df, dmesg, gzip, kill, ls, mkdir, more, mount, rm, su, tar, etc. The purpose of the binary file depends on the system or application. If the software is installed by the user, the main program file of the software will be in the directory "/usr/local/bin".

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

What is the Linux bin directory?

bin is the abbreviation of binary. The directory contains binary executable files, which are mainly used to store system essentials. Execution files, such as:
cat, cp, chmod df, dmesg, gzip, kill, ls, mkdir, more, mount, rm, su, tar, etc.

Binary file

Simply put, text files are files based on character encoding. Common encodings include ASCII encoding and UNICODE Encoding and more. Binary files are files based on value encoding. You can specify what a certain value means according to the specific application (such a process can be regarded as custom encoding). As can be seen from the above, text files are basically fixed-length encoded. Based on characters, each character is fixed in the specific encoding. ASCII code is an 8-bit encoding, and UNICODE generally occupies 16 bits. Binary files can be regarded as variable-length encoding, because it is value encoding. How many bits represent a value is entirely up to you.

Explanation:

There is also a bin directory under /usr: /usr/bin, and the file paths in it are also executable files for some commands;

If the software is installed by the user, the main program file of the software will be in the directory /usr/local/bin (or the installation directory specified by the user, such as /usr/local/apache/bin) . Such as /usr/local/apache/bin).

Expand knowledge

In the Linux system, there are two important directories: bin and sbin, including /bin, /usr/bin/ and /sbin, /usr/sbin/.

• /usr/bin:

Mainly places the necessary executable files of application tools, for example:

c, g, gcc, chdrv, diff, dig, du, eject, elm, free, gnome*, gzip, htpasswd, kfm, ktop, last, less, locale, m4, make, man, mcopy, ncftp , newaliases, nslookup passwd, quota, smb*, wget, etc.

• /sbin:

Mainly places necessary programs for system management, such as:

cfdisk, dhcpcd, dump, e2fsck, fdisk, halt, ifconfig, ifup, ifdown, init, insmod, lilo, lsmod, mke2fs, modprobe, quotacheck, reboot, rmmod, runlevel, shutdown, etc.

• /usr/sbin:

Mainly places necessary programs for network management, such as:

dhcpd, httpd, imap, in.*d, inetd, lpd, named, netconfig, nmbd, samba, sendmail, squid, swap, tcpd, tcpdump, etc.

/bin,/sbin,/usr The difference between /bin and /usr/sbin

/  : this is root directory                root 用户根目录
/bin : commands in this dir are all system installed user commands    系统的一些指令
/sbin:  commands in this dir are all system installed super user commands  超级用户指令 系统管理命令，这里存放的是系统管理员使用的管理程序
/usr/bin: user commands for applications  后期安装的一些软件的运行脚本
/usr/sbin: super user commands for applications  超级用户的一些管理程序
/usr/X11R6/bin : X application user commands
/usr/X11R6/sbin: X application super user commands

Linux command list

Recommended learning: Linux video tutorial

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