- In Linux system, the executable commands are usually stored in / bin, / sbin, / user/bin, / user/sbing. The details are as follows:
Store the most basic and necessary execution commands of system operation, that is, the commands that can be executed for all users. The following is the bin directory under the mac system. The standard Linux server contains more:
xyzdeMacBook-Pro:bin xyz ls [ cp df hostname link mv rm stty unlink bash csh echo kill ln pax rmdir sync wait4path cat date ed ksh ls ps sh tcsh zsh chmod dd expr launchctl mkdir pwd sleep test
Store system management commands, such as ping, ifconfig and other network related commands, as follows:
xyzdeMacBook-Pro:sbin xyz ls apfs_hfs_convert fsck_hfs kextunload mount_exfat newfs_apfs quotacheck autodiskmount fsck_msdos launchd mount_fdesc newfs_exfat reboot disklabel fsck_udf md5 mount_ftp newfs_hfs route dmesg fstyp mknod mount_hfs newfs_msdos rtsol dynamic_pager fstyp_hfs mount mount_msdos newfs_udf shutdown emond fstyp_msdos mount_acfs mount_nfs nfsd umount fibreconfig fstyp_ntfs mount_afp mount_ntfs nfsiod fsck fstyp_udf mount_apfs mount_smbfs nologin fsck_apfs halt mount_cd9660 mount_udf pfctl fsck_cs ifconfig mount_cddafs mount_webdav ping fsck_exfat kextload mount_devfs mpioutil ping6
- Store some commands and software that users need for daily use and work, such as vi, wc, curl, etc., and programming language commands such as python, java, jstat, etc., that is, when the system pre installs relevant software, the executable files of the software will be added to the directory.
The difference between / usr/bin and / usr/bin is that the command under / user/bin is usually pre installed on the system and will change with the upgrade of the system. And / user/local/bin is usually used to store the software downloaded and installed by the user or the executable command written by the user. The command with the same name here will not be overwritten by the system upgrade. For example, mysql, redis cli, mvn, etc. Generally speaking, these software are connected to the address of the actual executable command through the way of soft connection, generally according to the directory / user/local:
lrwxr-xr-x 1 xieyizun admin 51B 8 9 2018 mysql -> /usr/local/mysql-5.7.23-macos10.13-x86_64/bin/mysql lrwxr-xr-x 1 xieyizun admin 68B 8 13 2018 mysql.server -> /usr/local/mysql-5.7.23-macos10.13-x86_64/support-files/mysql.server lrwxr-xr-x 1 xieyizun admin 51B 8 12 2018 mysql_config -> ../Cellar/mysql-connector-c/6.1.11/bin/mysql_config lrwxr-xr-x 1 xieyizun admin 55B 8 28 2018 mysqldump -> /usr/local/mysql-5.7.23-macos10.13-x86_64/bin/mysqldump
- Store applications that super users can use.