A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
-bash/zsh: systemd-analyze command not found # Windows (WSL2) sudo apt-get update sudo apt-get install systemd # Debian apt-get install systemd # Ubuntu apt-get install systemd # Arch Linux pacman -S systemd # Kali Linux apt-get install systemd # CentOS yum install systemd # Fedora dnf install systemd # Raspbian apt-get install systemd # Dockerfile dockerfile.run/systemd-analyze
systemd-analyze 是一个分析启动性能的工具，用于分析启动时服务时间消耗。默认显示启动是内核和用户空间的消耗时间：使用 systemd-analyze plot > boot.svg 生成一张启动详细信息矢量图，然后用图像浏览器或者网页浏览器打开查看 。
systemd-analyze [OPTIONS...] [time]
systemd-analyze [OPTIONS...] blame
systemd-analyze [OPTIONS...] critical-chain [UNIT...]
systemd-analyze [OPTIONS...] dump [PATTERN...]
systemd-analyze [OPTIONS...] plot [>file.svg]
systemd-analyze [OPTIONS...] dot [PATTERN...] [>file.dot]
systemd-analyze [OPTIONS...] unit-files
systemd-analyze [OPTIONS...] unit-paths
systemd-analyze [OPTIONS...] exit-status [STATUS...]
systemd-analyze [OPTIONS...] capability [CAPABILITY... | {-m | --mask} MASK]
systemd-analyze [OPTIONS...] condition CONDITION...
systemd-analyze [OPTIONS...] syscall-filter [SET...]
systemd-analyze [OPTIONS...] filesystems [SET...]
systemd-analyze [OPTIONS...] calendar SPEC...
systemd-analyze [OPTIONS...] timestamp TIMESTAMP...
systemd-analyze [OPTIONS...] timespan SPAN...
systemd-analyze [OPTIONS...] cat-config NAME|PATH...
systemd-analyze [OPTIONS...] compare-versions VERSION1 [OP] VERSION2
systemd-analyze [OPTIONS...] verify FILE...
systemd-analyze [OPTIONS...] security [UNIT...]
systemd-analyze [OPTIONS...] inspect-elf FILE...
systemd-analyze [OPTIONS...] malloc [D-BUS SERVICE...]
systemd-analyze [OPTIONS...] fdstore UNIT...
systemd-analyze [OPTIONS...] image-policy POLICY...
systemd-analyze [OPTIONS...] has-tpm2
systemd-analyze [OPTIONS...] pcrs [PCR...]
systemd-analyze [OPTIONS...] srk [>FILE]
systemd-analyze [OPTIONS...] architectures [NAME...]
systemd-analyze [OPTIONS...] smbios11
--user Operates on the user systemd instance. --system Operates on the system systemd instance. This is the implied default. --order, --require When used in conjunction with the dot command (see above), selects which dependencies are shown in the dependency graph. If --order is passed, only dependencies of type After= or Before= are shown. If --require is passed, only dependencies of type Requires=, Requisite=, Wants= and Conflicts= are shown. If neither is passed, this shows dependencies of all these types. --from-pattern=, --to-pattern= When used in conjunction with the dot command (see above), this selects which relationships are shown in the dependency graph. Both options require a glob(7) pattern as an argument, which will be matched against the left-hand and the right-hand, respectively, nodes of a relationship. Each of these can be used more than once, in which case the unit name must match one of the values. When tests for both sides of the relation are present, a relation must pass both tests to be shown. When patterns are also specified as positional arguments, they must match at least one side of the relation. In other words, patterns specified with those two options will trim the list of edges matched by the positional arguments, if any are given, and fully determine the list of edges shown otherwise. --fuzz=timespan When used in conjunction with the critical-chain command (see above), also show units, which finished timespan earlier, than the latest unit in the same level. The unit of timespan is seconds unless specified with a different unit, e.g. "50ms". --man=no Do not invoke man to verify the existence of man pages listed in Documentation=. --generators Invoke unit generators, see systemd.generator(7). Some generators require root privileges. When run under a normal users, enabling generators will generally result in some warnings. -H, --host= Execute the operation remotely. Specify a hostname, or a username and hostname separated by "@", to connect to. The hostname may optionally be suffixed by a container name, separated by ":", which connects directly to a specific container on the specified host. This will use SSH to talk to the remote machine manager instance. Container names may be enumerated with machinectl -H HOST. -M, --machine= Execute operation on a local container. Specify a container name to connect to. -h, --help Print a short help text and exit. --version Print a short version string and exit. --no-pager Do not pipe output into a pager.
systemd-analyze 列出所有正在运行的单元，按初始化时间排序：
systemd-analyze blame # 输入如下示例 25.634s kdump.service 21.346s sendmail.service 7.898s network.service 5.775s NetworkManager-wait-online.service 3.389s mariadb.service 1.605s named.service 1.357s dev-mapper-centos\x2droot.device 1.130s snmpd.service 1.064s tuned.service 676ms httpd.service 674ms lvm2-monitor.service 563ms systemd-tmpfiles-setup-dev.service 518ms NetworkManager.service 492ms lvm2-pvscan@8:2.service 334ms rhel-readonly.service 330ms home.mount 305ms var.mount 300ms fail2ban.service 257ms sshd.service 206ms systemd-sysctl.service 188ms tmp.mount 186ms systemd-logind.service 184ms named-setup-rndc.service 181ms sm-client.service 171ms backup.mount 170ms rsyslog.service 157ms systemd-tmpfiles-clean.service 147ms systemd-udevd.service 133ms boot.mount 129ms systemd-journald.service 125ms polkit.service ...
systemd-analyze 打印时间关键单元链的树：
systemd-analyze critical-chain # 类似如下输出： multi-user.target @39.664s └─sm-client.service @39.290s +181ms └─sendmail.service @17.943s +21.346s └─network.target @17.922s └─network.service @10.023s +7.898s └─NetworkManager-wait-online.service @4.246s +5.775s └─NetworkManager.service @3.727s +518ms └─dbus.service @3.549s └─basic.target @3.544s └─paths.target @3.544s └─brandbot.path @3.544s └─sysinit.target @3.543s └─systemd-update-utmp.service @3.516s +26ms └─auditd.service @3.423s +91ms └─systemd-tmpfiles-setup.service @3.331s +90ms └─rhel-import-state.service @3.284s +45ms └─local-fs.target @3.242s └─home.mount @2.911s +330ms └─dev-mapper-centos\x2dhome.device @2.909s
systemd-analyze 创建一个 SVG 文件，显示每个系统服务的启动时间，并突出显示它们初始化所花费的时间：
systemd-analyze plot > path/to/file.svg
systemd-analyze 绘制依赖关系图并将其转换为 SVG 文件：
systemd-analyze dot | dot -Tsvg > path/to/file.svg
systemd-analyze 显示正在运行的单元的安全分数：
systemd-analyze security