Author: JackTian
Source: Public Account "Jie Ge's IT Journey"
ID: Jake_Internet
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Original address: 7 tools that can replace the top command! (two)
Hello everyone, my name is Jack.
In the previous article, I introduced you to 11 tools that can replace the top command! ", today I will recommend 7 tools that can replace the top command. After reading the articles on these two alternatives, I believe it will open your eyes to the next small command of the Linux operating system.
1. atop
atop[^1] is an ASCII full-screen performance monitor for Linux operating system based on C language, which can record all processes (even if the process has been completed during the interval), system and process activity daily log Logging for long-term analysis, by color highlighting overloaded system resource usage, etc.
At the same time, it also periodically displays system-level activity related to CPU, memory, swap, disk (including LVM), and network layers, and for each process and thread, such as: CPU utilization, memory growth, disk utilization, priority level, username, status, and exit code.
In addition, atop can also be combined with the kernel module netatop, which can display the network activity of each process and thread.
Install atop:
# apt install atop
Download the netatop source package and unzip it. You need to perform the following steps as root to install the netatop kernel module and netatopd daemon.
# curl -LO https://www.atoptool.nl/download/netatop-3.1.tar.gz
# tar -zxf netatop-3.1.tar.gz
# apt install zlib1g-dev
# cd netatop-3.1
# make
# make install
Load the module and start the daemon:
# systemctl start netatop
Load the module and start the daemon automatically after boot:
# systemctl enable netatop
2. ctop
ctop[^2] is a Go language-based display that provides real-time indicators of multiple containers. Using ctop, you can quickly view the real-time status of container CPU, Memory, Network, IO and other indicators.
# sudo wget https://github.com/bcicen/ctop/releases/download/0.7.6/ctop-0.7.6-linux-amd64 -O /usr/local/bin/ctop
# sudo chmod +x /usr/local/bin/ctop
After the installation is complete, if you execute the ctopcommand prompt and dial unix /var/run/docker.sockreport an error in the pop-up window, the reason is that there is no docker file. You need to use the official installation script to automatically install it. You can execute: curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyunto install docker. After installing docker, you can install it in the /var/run/ directory. Check if the docker.sock file already exists, then you can execute ctop.
2.1 ctop parameter options
-a: show only active containers-f <string>: set the initial filter string-h: Display the help dialog-i: Invert the default color-r: Reverse container sort order-s: select the container sort field-v: output version information and exit
3. iftop
iftop[^3] does the same thing for network usage as top does for CPU usage, it listens for network traffic on named interfaces and displays a table of current bandwidth usage by host pair.
# apt install iftop
3.1 iftop parameter options
-h: Display help information-n: Do not do hostname lookup-N: Do not convert port numbers to services-p: run in complex mode (shows traffic between other hosts on the same network segment)-b: Do not display the bar graph-B: Display bandwidth in bytes-i interface: Specifies the listening interface-f filter code: Use filter code to select packets to be counted (do not count by default, but only count IP packets)-F net/mask: Display incoming/outgoing IPv4 network traffic-G net6/mask6: Display incoming/outgoing IPv6 network traffic-l: display and count link-local IPv6 traffic (default: off)-P: show port and host-m limit: Set the bandwidth cap-c config file: specify an alternate configuration file-t: use the text interface without ncurses
4. iotop
iotop[^4] is a utility that can identify the processes that are using a lot of I/O requests on your machine, similar to top, but instead of showing you information about what is consuming the most CPU, it is listed by process IO usage related process.
Inspired by Guillaume Chazarain's iotop Python script, rewritten in C by Vyacheslav Trushkin and improved by Boian Bonev, it runs completely without Python.
iotop can run on operating systems of Debian, Ubuntu, Fedora, CentOS 7/8, RHEL 7/8, other Linux distributions.
# apt install iotop
4.1 iotop parameter options
--version: Display the version number of the program and exit-h, --help: display help information and exit-o, --only: Show only the process or thread that actually performs the I/O operation-b, --batch: non-interactive mode-n NUM, --iter=NUM: number of iterations until end [infinity]-d SEC, --delay=SEC: iteration interval [1s]-p PID, --pid=PID: monitored processes/threads [all]-u USER, --user=USER: monitored users [all]-P, --processes: show only processes, not all threads-a, --accumulated: Show cumulative I/O, not bandwidth-k, --kilobytes: use kilobytes as a unit-t, --time: add a timestamp to each line-q, --quiet: disable some header lines--no-help: suppress listing of shortcuts
4.2 iotop hotkey
any: any other key forces a refreshq:quiti: Change the I/O priorityo: show only active processesr: reverse the sort order方向左右键: change the sort column
Five, nmon
nmon[^5] is a computer performance system monitoring tool for AIX and Linux operating systems that displays local system statistics (CPU, memory, network, disk, Filesystems, NFS, Processes, Resources, etc.), saves statistics to a comma-separated (CSV) data file in a logging format for graphing and analysis to help understand computer resource usage, tuning options, and related bottlenecks.
-FIf you specify any of the , -f, -X, -xand parameter options when running nmon -Z, nmon will be in logging mode, and if you do not add any parameter options nmon will be in interactive mode.
# apt install nmon
For more help information nmon -h, check out nmon's help manual.
Six, slabtop
slabtop[^6] is to display the detailed information of the kernel "slab" buffer in real time.
usage:
slabtop [选项]
Options:
-d n--delay=n: Update the displayed information every n seconds, the default is every 3 seconds-o--once: exit after showing once-s S--sort=S: Specify sorting criteria (below) to sort-h--help: display help information-V--version: show the program version
Sort Criteria:
a: Sort by the number of active objectsb: Sort by objects per slabc: Sort by cache sizel: Sort by slabsv: Sort by the number of active slabsn: sort by nameo: Sort by number of objectsp: Sort by the number of pages in each slabs: Sort by object sizeu: Sort by cache utilization
Display kernel slab buffer information:
Active / Total Objects (% used) : 567933 / 601056 (94.5%)
Active / Total Slabs (% used) : 22815 / 22815 (100.0%)
Active / Total Caches (% used) : 106 / 175 (60.6%)
Active / Total Size (% used) : 160092.21K / 167455.54K (95.6%)
Minimum / Average / Maximum Object : 0.01K / 0.28K / 8.00K
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
74382 70996 95% 0.19K 3542 21 14168K dentry
70005 60472 86% 0.10K 1795 39 7180K buffer_head
55648 55324 99% 0.50K 3478 16 27824K kmalloc-512
53376 53376 100% 0.12K 1668 32 6672K kernfs_node_cache
40192 39937 99% 0.03K 314 128 1256K kmalloc-32
36231 35951 99% 0.59K 2787 13 22296K inode_cache
34880 34617 99% 0.20K 1744 20 6976K vm_area_struct
21951 21711 98% 1.15K 813 27 26016K ext4_inode_cache
18368 15434 84% 0.06K 287 64 1148K anon_vma_chain
16170 13296 82% 0.57K 1155 14 9240K radix_tree_node
15360 15360 100% 0.02K 60 256 240K kmalloc-16
14848 14848 100% 0.01K 29 512 116K kmalloc-8
10944 10944 100% 0.06K 171 64 684K kmalloc-64
10540 8896 84% 0.02K 62 170 248K lsm_file_cache
10396 8866 85% 0.09K 226 46 904K anon_vma
9984 6569 65% 0.06K 156 64 624K vmap_area
9520 9520 100% 0.05K 112 85 448K ftrace_event_field
9184 7952 86% 0.25K 574 16 2296K filp
8580 8455 98% 0.66K 715 12 5720K proc_inode_cache
7956 7755 97% 0.04K 78 102 312K ext4_extent_status
7014 6173 88% 0.19K 334 21 1336K kmalloc-192
6720 6720 100% 0.07K 120 56 480K Acpi-Operand
5696 5436 95% 0.12K 178 32 712K kmalloc-128
4324 4324 100% 0.09K 94 46 376K trace_event_file
Seven, virt-top
virt-top[^7] is a utility similar to top, mainly used to display the statistics of the virtualization domain and the CPU, memory, virtual disk, virtual network, hypervisor, etc. in the Linux operating system, it needs The use of libvirt to display statistics for different virtualization systems.
virt-top supports installation on CentOS, RHEL, Debian, Ubuntu, Fedora, OpenSUSE and other operating systems.
Install Virt-top on CentOS, RHEL:
# yum install virt-top
Install Virt-top on Debian, Ubuntu:
# apt install virt-top
To install Virt-top on Fedora:
# dnf install virt-top
Install Virt-top on OpenSUSE:
# zypper install virt-top
For more information on the use of virt-top parameter options, please refer to the virt-top man page.
Reference link
[1] atop：https://www.atoptool.nl/index.php
[2] ctop：https://github.com/bcicen/ctop
[3] iftop：http://www.ex-parrot.com/~pdw/iftop/
[4] iotop：https://github.com/Tomas-M/iotop
[5] nmon：http://nmon.sourceforge.net/pmwiki.php
nmon：https://en.wikipedia.org/wiki/Nmon
nmon：https://www.ibm.com/docs/en/aix/7.1?topic=n-nmon-command
[6] slabtop：https://wangchujiang.com/linux-command/c/slabtop.html
[7] virt-top：https://linux.die.net/man/1/virt-top
virt-top：https://www.mankier.com/1/virt-top
virt-top：https://ostechnix.com/display-virtualization-systems-stats-with-virt-top-in-linux/
libvirt：https://libvirt.org/
recent original
- 11 Alternatives to the top Command
- 10 Linux alternatives you didn't know about
- 5 Alternatives to the du Command
- Running Linux online is really cool.
That's all for today.
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