How to free system of useless processes in a safe way?
I am kinda new to Ubuntu. For the past 4 months, I have been setting up various development environments for various purposes, the worst thing I did was just googling how to install this or do this and following the tutorials for getting the work done without realizing or understanding how this particular installation gonna affect my system. So now I have lots of useless processes that keeps running all the time like : mongodb, mysql-server, apache, etc:
Have a look at my current ps -aux output
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 5.2 0.1 102432 11780 ? Ss 14:04 0:01 /sbin/init sp
root 2 0.0 0.0 0 0 ? S 14:04 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? I< 14:04 0:00 [rcu_gp]
root 4 0.0 0.0 0 0 ? I< 14:04 0:00 [rcu_par_gp]
root 5 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/0:0-
root 6 0.0 0.0 0 0 ? I< 14:04 0:00 [kworker/0:0H
root 7 0.2 0.0 0 0 ? I 14:04 0:00 [kworker/0:1-
root 8 0.3 0.0 0 0 ? I 14:04 0:00 [kworker/u8:0
root 9 0.0 0.0 0 0 ? I< 14:04 0:00 [mm_percpu_wq
root 10 0.0 0.0 0 0 ? S 14:04 0:00 [rcu_tasks_ru
root 11 0.0 0.0 0 0 ? S 14:04 0:00 [rcu_tasks_tr
root 12 0.1 0.0 0 0 ? S 14:04 0:00 [ksoftirqd/0]
root 13 0.2 0.0 0 0 ? I 14:04 0:00 [rcu_sched]
root 14 0.0 0.0 0 0 ? S 14:04 0:00 [migration/0]
root 15 0.0 0.0 0 0 ? S 14:04 0:00 [idle_inject/
root 16 0.0 0.0 0 0 ? S 14:04 0:00 [cpuhp/0]
root 17 0.0 0.0 0 0 ? S 14:04 0:00 [cpuhp/1]
root 18 0.0 0.0 0 0 ? S 14:04 0:00 [idle_inject/
root 19 0.4 0.0 0 0 ? S 14:04 0:00 [migration/1]
root 20 0.1 0.0 0 0 ? S 14:04 0:00 [ksoftirqd/1]
root 21 0.3 0.0 0 0 ? I 14:04 0:00 [kworker/1:0-
root 22 0.0 0.0 0 0 ? I< 14:04 0:00 [kworker/1:0H
root 23 0.0 0.0 0 0 ? S 14:04 0:00 [cpuhp/2]
root 24 0.0 0.0 0 0 ? S 14:04 0:00 [idle_inject/
root 25 0.4 0.0 0 0 ? S 14:04 0:00 [migration/2]
root 26 0.1 0.0 0 0 ? S 14:04 0:00 [ksoftirqd/2]
root 27 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/2:0-
root 28 0.0 0.0 0 0 ? I< 14:04 0:00 [kworker/2:0H
root 29 0.0 0.0 0 0 ? S 14:04 0:00 [cpuhp/3]
root 30 0.0 0.0 0 0 ? S 14:04 0:00 [idle_inject/
root 31 0.4 0.0 0 0 ? S 14:04 0:00 [migration/3]
root 32 0.1 0.0 0 0 ? S 14:04 0:00 [ksoftirqd/3]
root 33 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/3:0-
root 34 0.0 0.0 0 0 ? I< 14:04 0:00 [kworker/3:0H
root 35 0.0 0.0 0 0 ? S 14:04 0:00 [kdevtmpfs]
root 36 0.0 0.0 0 0 ? I< 14:04 0:00 [netns]
root 37 0.0 0.0 0 0 ? I< 14:04 0:00 [inet_frag_wq
root 38 0.0 0.0 0 0 ? S 14:04 0:00 [kauditd]
root 39 0.1 0.0 0 0 ? I 14:04 0:00 [kworker/2:1-
root 40 0.1 0.0 0 0 ? I 14:04 0:00 [kworker/3:1-
root 41 0.0 0.0 0 0 ? S 14:04 0:00 [khungtaskd]
root 42 0.0 0.0 0 0 ? S 14:04 0:00 [oom_reaper]
root 43 0.0 0.0 0 0 ? I< 14:04 0:00 [writeback]
root 44 0.0 0.0 0 0 ? S 14:04 0:00 [kcompactd0]
root 45 0.0 0.0 0 0 ? SN 14:04 0:00 [ksmd]
root 46 0.0 0.0 0 0 ? SN 14:04 0:00 [khugepaged]
root 52 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/1:1-
root 93 0.0 0.0 0 0 ? I< 14:04 0:00 [kintegrityd]
root 94 0.0 0.0 0 0 ? I< 14:04 0:00 [kblockd]
root 95 0.0 0.0 0 0 ? I< 14:04 0:00 [blkcg_punt_b
root 96 0.0 0.0 0 0 ? I< 14:04 0:00 [tpm_dev_wq]
root 97 0.0 0.0 0 0 ? I< 14:04 0:00 [ata_sff]
root 98 0.0 0.0 0 0 ? I< 14:04 0:00 [md]
root 99 0.0 0.0 0 0 ? I< 14:04 0:00 [edac-poller]
root 100 0.0 0.0 0 0 ? I< 14:04 0:00 [devfreq_wq]
root 101 0.0 0.0 0 0 ? S 14:04 0:00 [watchdogd]
root 102 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/u8:1
root 103 0.0 0.0 0 0 ? I< 14:04 0:00 [kworker/1:1H
root 105 0.0 0.0 0 0 ? S 14:04 0:00 [kswapd0]
root 106 0.0 0.0 0 0 ? S 14:04 0:00 [ecryptfs-kth
root 108 0.0 0.0 0 0 ? I< 14:04 0:00 [kthrotld]
root 109 0.0 0.0 0 0 ? S 14:04 0:00 [irq/122-aerd
root 110 0.0 0.0 0 0 ? S 14:04 0:00 [irq/123-aerd
root 111 0.0 0.0 0 0 ? S 14:04 0:00 [irq/124-aerd
root 112 0.0 0.0 0 0 ? I< 14:04 0:00 [acpi_thermal
root 113 0.1 0.0 0 0 ? I 14:04 0:00 [kworker/u8:2
root 114 0.0 0.0 0 0 ? I< 14:04 0:00 [vfio-irqfd-c
root 115 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/2:2-
root 116 0.0 0.0 0 0 ? I< 14:04 0:00 [ipv6_addrcon
root 125 0.0 0.0 0 0 ? I< 14:04 0:00 [kstrp]
root 128 0.0 0.0 0 0 ? I< 14:04 0:00 [zswap-shrink
root 129 0.0 0.0 0 0 ? I< 14:04 0:00 [kworker/u9:0
root 136 0.0 0.0 0 0 ? I< 14:04 0:00 [charger_mana
root 168 0.0 0.0 0 0 ? I< 14:04 0:00 [kworker/3:1H
root 187 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/1:2-
root 188 0.0 0.0 0 0 ? I< 14:04 0:00 [kworker/2:1H
root 196 0.1 0.0 0 0 ? I< 14:04 0:00 [kworker/0:1H
root 197 0.0 0.0 0 0 ? S 14:04 0:00 [scsi_eh_0]
root 198 0.0 0.0 0 0 ? I< 14:04 0:00 [scsi_tmf_0]
root 199 0.0 0.0 0 0 ? S 14:04 0:00 [scsi_eh_1]
root 200 0.0 0.0 0 0 ? I< 14:04 0:00 [scsi_tmf_1]
root 201 0.0 0.0 0 0 ? S 14:04 0:00 [scsi_eh_2]
root 202 0.0 0.0 0 0 ? I< 14:04 0:00 [scsi_tmf_2]
root 203 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/u8:3
root 204 0.2 0.0 0 0 ? I 14:04 0:00 [kworker/0:2-
root 205 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/u8:4
root 207 0.7 0.0 0 0 ? I 14:04 0:00 [kworker/u8:5
root 208 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/0:3-
root 234 0.0 0.0 0 0 ? S 14:04 0:00 [jbd2/sdb2-8]
root 235 0.0 0.0 0 0 ? I< 14:04 0:00 [ext4-rsv-con
root 283 1.6 1.0 187436 85516 ? S<s 14:04 0:00 /lib/systemd/
root 313 2.2 0.0 24048 7288 ? Ss 14:04 0:00 /lib/systemd/
root 318 0.0 0.0 0 0 ? S< 14:04 0:00 [loop0]
root 321 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/1:3-
root 322 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/1:4-
root 324 0.0 0.0 0 0 ? S< 14:04 0:00 [loop1]
root 329 0.0 0.0 0 0 ? S< 14:04 0:00 [loop2]
root 330 0.0 0.0 0 0 ? S< 14:04 0:00 [loop3]
root 332 0.0 0.0 0 0 ? S< 14:04 0:00 [loop4]
root 344 0.0 0.0 0 0 ? S< 14:04 0:00 [loop5]
root 357 0.0 0.0 0 0 ? S< 14:04 0:00 [loop6]
root 385 0.0 0.0 0 0 ? S< 14:04 0:00 [loop7]
root 386 0.0 0.0 0 0 ? S< 14:04 0:00 [loop8]
root 388 0.0 0.0 0 0 ? S< 14:04 0:00 [loop9]
root 390 0.1 0.0 0 0 ? I 14:04 0:00 [kworker/3:2-
root 391 0.0 0.0 0 0 ? S< 14:04 0:00 [loop10]
root 394 0.0 0.0 0 0 ? S< 14:04 0:00 [loop11]
root 395 0.0 0.0 0 0 ? S< 14:04 0:00 [loop12]
root 400 0.0 0.0 0 0 ? S< 14:04 0:00 [loop13]
root 402 0.0 0.0 0 0 ? S 14:04 0:00 [irq/128-mei_
root 409 0.0 0.0 0 0 ? S< 14:04 0:00 [loop14]
root 412 0.0 0.0 0 0 ? S< 14:04 0:00 [loop15]
root 414 0.0 0.0 0 0 ? S< 14:04 0:00 [loop16]
root 415 0.0 0.0 0 0 ? I< 14:04 0:00 [cfg80211]
root 426 0.0 0.0 0 0 ? I< 14:04 0:00 [kworker/u9:1
root 428 0.0 0.0 0 0 ? S< 14:04 0:00 [loop17]
root 430 0.0 0.0 0 0 ? I< 14:04 0:00 [kworker/u9:2
root 431 0.0 0.0 0 0 ? I< 14:04 0:00 [cryptd]
root 435 0.0 0.0 0 0 ? S< 14:04 0:00 [loop18]
root 437 0.3 0.0 0 0 ? S 14:04 0:00 [irq/129-iwlw
root 459 0.0 0.0 0 0 ? S< 14:04 0:00 [loop19]
root 469 0.0 0.0 0 0 ? S 14:04 0:00 [card0-crtc0]
root 470 0.0 0.0 0 0 ? S 14:04 0:00 [card0-crtc1]
root 471 0.0 0.0 0 0 ? S 14:04 0:00 [card0-crtc2]
root 473 0.0 0.0 0 0 ? S< 14:04 0:00 [loop20]
root 483 0.0 0.0 0 0 ? S< 14:04 0:00 [loop21]
root 499 0.0 0.0 0 0 ? I< 14:04 0:00 [ttm_swap]
root 500 0.0 0.0 0 0 ? S< 14:04 0:00 [loop22]
root 502 0.0 0.0 0 0 ? S 14:04 0:00 [gfx]
root 505 0.0 0.0 0 0 ? S 14:04 0:00 [comp_1.0.0]
root 506 0.0 0.0 0 0 ? S 14:04 0:00 [comp_1.0.1]
root 507 0.0 0.0 0 0 ? S 14:04 0:00 [comp_1.0.2]
root 508 0.0 0.0 0 0 ? S 14:04 0:00 [comp_1.0.3]
root 509 0.0 0.0 0 0 ? S 14:04 0:00 [comp_1.0.4]
root 510 0.0 0.0 0 0 ? S 14:04 0:00 [comp_1.0.5]
root 511 0.0 0.0 0 0 ? S 14:04 0:00 [comp_1.0.6]
root 512 0.0 0.0 0 0 ? S 14:04 0:00 [comp_1.0.7]
root 513 0.0 0.0 0 0 ? S 14:04 0:00 [sdma0]
root 515 0.0 0.0 0 0 ? S 14:04 0:00 [sdma1]
root 519 0.0 0.0 0 0 ? S< 14:04 0:00 [loop23]
root 524 0.0 0.0 0 0 ? S< 14:04 0:00 [loop24]
root 525 0.0 0.0 0 0 ? S< 14:04 0:00 [loop25]
root 532 0.0 0.0 0 0 ? S< 14:04 0:00 [loop26]
root 553 0.0 0.0 0 0 ? S< 14:04 0:00 [loop27]
root 555 0.0 0.0 0 0 ? S< 14:04 0:00 [loop28]
root 556 0.0 0.0 0 0 ? S< 14:04 0:00 [loop29]
root 557 0.0 0.0 0 0 ? S< 14:04 0:00 [loop30]
root 558 0.0 0.0 0 0 ? S< 14:04 0:00 [loop31]
root 559 0.0 0.0 0 0 ? S< 14:04 0:00 [loop32]
root 560 0.0 0.0 0 0 ? S< 14:04 0:00 [loop33]
root 810 0.0 0.0 22156 5736 ? Ss 14:04 0:00 /lib/systemd/
systemd+ 843 0.6 0.1 24168 13276 ? Ss 14:04 0:00 /lib/systemd/
systemd+ 846 0.3 0.0 90260 6032 ? Ssl 14:04 0:00 /lib/systemd/
root 849 0.0 0.0 0 0 ? I 14:04 0:00 [kworker/3:3-
root 901 0.4 0.1 239684 8564 ? Ssl 14:04 0:00 /usr/lib/acco
root 902 0.0 0.0 2548 716 ? Ss 14:04 0:00 /usr/sbin/acp
avahi 905 0.2 0.0 8536 3492 ? Ss 14:04 0:00 avahi-daemon:
root 906 0.0 0.0 8428 4460 ? Ss 14:04 0:00 /usr/lib/blue
root 907 0.0 0.0 9756 2900 ? Ss 14:04 0:00 /usr/sbin/cro
root 908 0.0 0.1 29196 9408 ? Ss 14:04 0:00 /usr/sbin/cup
message+ 910 4.5 0.0 9936 6460 ? Ss 14:04 0:01 /usr/bin/dbus
root 911 3.0 0.2 337796 21544 ? Ssl 14:04 0:00 /usr/sbin/Net
root 918 0.0 0.0 81904 3616 ? Ssl 14:04 0:00 /usr/sbin/irq
root 924 0.4 0.2 39668 20140 ? Ss 14:04 0:00 /usr/bin/pyth
root 927 5.4 0.1 235016 10308 ? Ssl 14:04 0:01 /usr/lib/poli
syslog 929 0.3 0.0 224356 5048 ? Ssl 14:04 0:00 /usr/sbin/rsy
root 935 8.3 0.4 999440 33212 ? Ssl 14:04 0:02 /usr/lib/snap
root 940 0.0 0.0 235944 5940 ? Ssl 14:04 0:00 /usr/libexec/
root 944 0.8 0.1 16788 8368 ? Ss 14:04 0:00 /lib/systemd/
root 947 0.1 0.1 126224 10072 ? Ssl 14:04 0:00 /usr/sbin/the
root 949 1.1 0.1 393656 13904 ? Ssl 14:04 0:00 /usr/lib/udis
root 950 0.1 0.1 13940 8712 ? Ss 14:04 0:00 /sbin/wpa_sup
avahi 956 0.0 0.0 8352 328 ? S 14:04 0:00 avahi-daemon:
root 992 0.2 0.1 178576 13096 ? Ssl 14:04 0:00 /usr/sbin/cup
colord 996 0.7 0.1 246636 14780 ? Ssl 14:04 0:00 /usr/libexec/
mongodb 1001 3.8 1.2 1496392 100112 ? Ssl 14:04 0:00 /usr/bin/mong
root 1009 2.3 0.1 527256 9756 ? Ssl 14:04 0:00 /snap/canonic
root 1019 0.2 0.1 313756 10836 ? Ssl 14:04 0:00 /usr/sbin/Mod
root 1023 0.3 0.0 16264 5724 ? Ss 14:04 0:00 /lib/systemd/
root 1045 0.5 0.5 1047080 46888 ? Ssl 14:04 0:00 /usr/bin/cont
root 1079 0.1 0.1 239952 8816 ? Ssl 14:04 0:00 /usr/sbin/gdm
root 1087 0.3 0.2 118468 22768 ? Ssl 14:04 0:00 /usr/bin/pyth
debian-+ 1098 2.3 0.4 38652 33852 ? Ss 14:04 0:00 /usr/bin/tor
mysql 1121 3.7 4.7 2128896 383016 ? Ssl 14:04 0:00 /usr/sbin/mys
root 1122 0.0 0.1 163580 8704 ? Ssl 14:04 0:00 /usr/lib/Netw
root 1135 0.0 0.0 13640 5172 ? Ss 14:04 0:00 /usr/sbin/apa
www-data 1136 0.0 0.1 1942204 11168 ? Sl 14:04 0:00 /usr/sbin/apa
www-data 1137 0.0 0.1 1942204 11116 ? Sl 14:04 0:00 /usr/sbin/apa
postgres 1143 0.0 0.3 218636 29212 ? Ss 14:04 0:00 /usr/lib/post
gdm 1200 1.0 0.1 19028 10220 ? Ss 14:04 0:00 /lib/systemd/
gdm 1201 0.0 0.0 103708 3904 ? S 14:04 0:00 (sd-pam)
postgres 1212 0.0 0.0 218636 4472 ? Ss 14:04 0:00 postgres: 12/
postgres 1213 0.0 0.0 218636 6116 ? Ss 14:04 0:00 postgres: 12/
postgres 1214 0.0 0.1 218636 10188 ? Ss 14:04 0:00 postgres: 12/
postgres 1215 0.0 0.0 219180 7116 ? Ss 14:04 0:00 postgres: 12/
postgres 1216 0.0 0.0 73000 4924 ? Ss 14:04 0:00 postgres: 12/
postgres 1217 0.0 0.0 219176 7000 ? Ss 14:04 0:00 postgres: 12/
gdm 1235 0.5 0.3 511856 24552 ? SNsl 14:04 0:00 /usr/libexec/
gdm 1239 0.1 0.0 7400 4420 ? Ss 14:04 0:00 /usr/bin/dbus
rtkit 1242 0.0 0.0 152940 2960 ? SNsl 14:04 0:00 /usr/libexec/
gdm 1256 0.0 0.0 240048 7684 ? Ssl 14:04 0:00 /usr/libexec/
gdm 1271 0.0 0.0 312808 6256 ? Sl 14:04 0:00 /usr/libexec/
gdm 1278 2.4 0.1 314396 9784 ? Ssl 14:04 0:00 /usr/libexec/
gdm 1311 0.0 0.1 317060 9012 ? Ssl 14:04 0:00 /usr/libexec/
gdm 1321 0.0 0.0 238316 6740 ? Ssl 14:04 0:00 /usr/libexec/
gdm 1333 0.0 0.0 236040 6380 ? Ssl 14:04 0:00 /usr/libexec/
gdm 1337 0.0 0.0 236212 6276 ? Ssl 14:04 0:00 /usr/libexec/
gdm 1342 0.3 0.4 545372 36252 ? Sl 14:04 0:00 /usr/libexec/
gdm 1364 0.0 0.1 315092 9092 ? Sl 14:04 0:00 /usr/libexec/
root 1376 0.4 0.1 252712 10128 ? Ssl 14:04 0:00 /usr/lib/upow
gdm 1440 0.3 0.2 361312 22160 ? Ssl 14:04 0:00 /usr/libexec/
root 1563 0.3 0.0 16268 5808 ? Ss 14:04 0:00 /lib/systemd/
geoclue 1584 0.5 0.1 279872 11828 ? Ssl 14:04 0:00 /usr/libexec/
root 1585 2.1 0.9 485456 75256 ? Ssl 14:04 0:00 /usr/lib/pack
root 1707 0.1 0.0 225760 7824 ? Ssl 14:04 0:00 /usr/libexec/
root 1799 0.2 0.1 167548 10788 ? Sl 14:04 0:00 gdm-session-w
root 1815 1.5 1.1 1021008 89784 ? Ssl 14:04 0:00 /usr/bin/dock
whoopsie 1818 0.4 0.1 253128 15612 ? Ssl 14:04 0:00 /usr/bin/whoo
kernoops 1819 0.0 0.0 11264 452 ? Ss 14:04 0:00 /usr/sbin/ker
kernoops 1821 0.0 0.0 11264 448 ? Ss 14:04 0:00 /usr/sbin/ker
root 1826 1.4 0.1 1142532 11420 ? Sl 14:04 0:00 /opt/teamview
root 1860 0.0 0.0 2496 520 ? S 14:04 0:00 bpfilter_umh
xyz 2038 1.5 0.1 19280 10548 ? Ss 14:04 0:00 /lib/systemd/
xyz 2039 0.0 0.0 104100 3964 ? S 14:04 0:00 (sd-pam)
xyz 2044 0.6 0.2 1220796 19304 ? S<sl 14:04 0:00 /usr/bin/puls
xyz 2046 1.6 0.3 512168 25084 ? SNsl 14:04 0:00 /usr/libexec/
xyz 2050 1.3 0.0 8148 5288 ? Ss 14:04 0:00 /usr/bin/dbus
xyz 2065 0.0 0.0 240048 7568 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2067 0.3 0.0 240520 7688 ? Sl 14:04 0:00 /usr/bin/gnom
xyz 2074 0.0 0.0 312808 6516 ? Sl 14:04 0:00 /usr/libexec/
xyz 2081 1.0 0.1 314424 9692 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2087 0.0 0.1 317060 8556 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2092 0.0 0.0 238316 6380 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2096 0.0 0.0 236040 5980 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2103 0.0 0.0 236832 6904 ? Ssl 14:04 0:00 /usr/libexec/
root 2104 0.0 0.0 0 0 ? S< 14:04 0:00 [krfcommd]
xyz 2108 3.4 0.8 696364 71428 ? SLl 14:04 0:00 /usr/libexec/
xyz 2115 0.0 0.1 315092 8668 ? Sl 14:04 0:00 /usr/libexec/
xyz 2124 1.6 0.3 435216 27560 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2136 0.0 0.0 164356 6568 tty2 Ssl+ 14:04 0:00 /usr/lib/gdm3
xyz 2138 5.7 0.9 1650476 76436 tty2 Sl+ 14:04 0:00 /usr/lib/xorg
xyz 2163 0.1 0.1 188560 13752 tty2 Sl+ 14:04 0:00 /usr/libexec/
xyz 2231 0.0 0.0 6040 452 ? Ss 14:04 0:00 /usr/bin/ssh-
xyz 2253 0.0 0.0 305436 6860 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2258 0.0 0.0 7248 4344 ? S 14:04 0:00 /usr/bin/dbus
xyz 2268 0.0 0.0 240228 7616 ? Sl 14:04 0:00 /usr/bin/gnom
xyz 2271 0.0 0.0 90400 4404 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2281 0.6 0.1 410760 15784 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2295 15.8 2.2 4257528 180756 ? Ssl 14:04 0:02 /usr/bin/gnom
xyz 2319 0.0 0.1 311284 8240 ? Sl 14:04 0:00 ibus-daemon -
xyz 2323 0.0 0.0 236884 7244 ? Sl 14:04 0:00 /usr/libexec/
xyz 2324 11.4 0.3 273112 28676 ? Sl 14:04 0:01 /usr/libexec/
xyz 2326 1.1 0.2 193828 23776 ? Sl 14:04 0:00 /usr/libexec/
xyz 2332 0.0 0.0 236840 7148 ? Sl 14:04 0:00 /usr/libexec/
xyz 2339 0.0 0.0 162840 7652 ? Sl 14:04 0:00 /usr/libexec/
xyz 2346 0.0 0.0 235932 4072 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2348 0.3 0.2 802200 19708 ? Sl 14:04 0:00 /usr/libexec/
xyz 2357 1.4 0.4 689316 34132 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2365 0.0 0.0 156624 5968 ? Sl 14:04 0:00 /usr/libexec/
xyz 2368 0.0 0.0 162524 5952 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2377 1.6 0.5 1350272 40484 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2381 0.4 0.3 2734032 26228 ? Sl 14:04 0:00 /usr/bin/gjs
xyz 2395 0.0 0.0 310016 6352 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2396 1.9 0.3 574404 26256 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2397 0.1 0.1 373976 15928 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2398 0.1 0.0 312080 7168 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2399 1.3 0.3 415704 25044 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2400 1.5 0.3 1102024 27640 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2401 1.3 0.3 489756 25064 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2402 0.0 0.1 322304 11232 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2403 0.0 0.0 457436 6104 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2405 0.0 0.0 235844 5844 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2406 0.0 0.0 163028 7184 ? Sl 14:04 0:00 /usr/libexec/
xyz 2409 0.2 0.1 465268 10328 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2410 0.0 0.1 389244 8404 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2414 0.0 0.1 319708 9008 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2416 0.0 0.0 459048 7040 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2424 1.3 0.2 341408 24172 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2428 0.0 0.0 388068 7704 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2430 1.3 0.3 342684 25648 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2438 0.4 0.3 747276 29776 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2480 0.0 0.1 342524 15260 ? Sl 14:04 0:00 /usr/libexec/
xyz 2507 0.0 0.0 231800 5932 ? Sl 14:04 0:00 /usr/libexec/
xyz 2515 2.5 0.7 636116 58424 ? Sl 14:04 0:00 /usr/libexec/
xyz 2519 7.3 0.6 3844756 53852 ? Sl 14:04 0:00 /opt/xdman/jr
xyz 2561 17.4 0.5 978892 45452 ? Sl 14:04 0:02 /snap/snap-st
xyz 2586 0.0 0.0 457868 6424 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2728 0.2 0.1 462944 10508 ? Ssl 14:04 0:00 /usr/libexec/
xyz 2732 0.8 0.3 490568 26252 ? Ssl 14:04 0:00 /usr/libexec/
root 2754 2.7 0.3 379264 26820 ? Ssl 14:04 0:00 /usr/libexec/
root 2759 0.3 0.0 238804 7444 ? Ssl 14:04 0:00 /usr/lib/bolt
xyz 2771 4.8 0.6 859956 54432 ? Rsl 14:04 0:00 /usr/libexec/
xyz 2779 0.5 0.1 14384 8400 pts/0 Ss 14:04 0:00 bash
_apt 3032 2.0 0.1 27056 13024 ? S 14:04 0:00 /usr/lib/apt/
_apt 3033 0.5 0.1 27056 13096 ? S 14:04 0:00 /usr/lib/apt/
_apt 3034 0.0 0.1 24152 9680 ? S 14:04 0:00 /usr/lib/apt/
_apt 3035 0.5 0.1 27056 12972 ? S 14:04 0:00 /usr/lib/apt/
_apt 3036 0.0 0.1 27056 13000 ? S 14:04 0:00 /usr/lib/apt/
_apt 3037 0.0 0.1 24152 9608 ? S 14:04 0:00 /usr/lib/apt/
_apt 3038 0.0 0.1 24152 9592 ? S 14:04 0:00 /usr/lib/apt/
_apt 3039 0.0 0.1 24156 9728 ? S 14:04 0:00 /usr/lib/apt/
_apt 3040 0.5 0.1 27056 13040 ? S 14:04 0:00 /usr/lib/apt/
_apt 3041 1.0 0.1 27056 13032 ? S 14:04 0:00 /usr/lib/apt/
_apt 3042 1.0 0.1 27056 12856 ? S 14:04 0:00 /usr/lib/apt/
_apt 3043 0.5 0.1 24152 9696 ? S 14:04 0:00 /usr/lib/apt/
_apt 3044 0.5 0.1 24152 9564 ? S 14:04 0:00 /usr/lib/apt/
_apt 3052 2.0 0.0 17808 6984 ? S 14:04 0:00 /usr/lib/apt/
_apt 4808 0.0 0.0 18108 7836 ? S 14:04 0:00 /usr/lib/apt/
_apt 4908 0.0 0.0 17808 3172 ? S 14:04 0:00 /usr/lib/apt/
_apt 4909 0.0 0.0 2616 1748 ? S 14:04 0:00 /bin/sh /usr/
xyz 4927 0.0 0.0 12028 3456 pts/0 R+ 14:04 0:00 ps -aux
Now I want to free up my CPU usage from everything except the ones which are important for the system.
Is there any safe and easier way to achieve this?
Solution 1:
Is there any safe and easier way to achieve this?
Either remove the corresponding software or disable the service from starting at boot (where you can still start/stop it manually when you need/no more need it).
In regards to the latter your question needs more focus; I searched the 2 important ones for you ...
-
MySQL has its own topic on this How to disable MySQL server from constantly running in the background?
-
Apache too How do I stop Apache2 from automatically starting on boot?
and for any other user installed server software there will be a similar method. Each of the processes you do not want active after a boot will need to google the method for.
Generic answer if the process is started from a service. To disable/start/stop:
sudo systemctl disable {service}
sudo service {service} start
sudo service {service} stop
where {service} could be for instance mysql or apache2 or mongodb.