Linux: Difference between revisions
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Example output: | Example output: | ||
<pre style="color: silver; background: black;"> | <pre style="color: silver; background: black;width: 800px"> | ||
CentOS Linux release 7.5.1804 (Core) | CentOS Linux release 7.5.1804 (Core) | ||
NAME="CentOS Linux" | NAME="CentOS Linux" | ||
Revision as of 18:29, 12 March 2019
Linux
Useful Commands
Show what is listening on what port
netstat -tulpn | grep LISTEN
Example output:
tcp 0 0 0.0.0.0:5666 0.0.0.0:* LISTEN 685/nrpe tcp 0 0 127.0.0.1:199 0.0.0.0:* LISTEN 958/snmpd tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 962/sshd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1179/master tcp6 0 0 :::5666 :::* LISTEN 685/nrpe tcp6 129 0 :::2224 :::* LISTEN 663/ruby tcp6 0 0 :::22 :::* LISTEN 962/sshd tcp6 0 0 ::1:25 :::* LISTEN 1179/master
Show what version of Linux is running
cat /etc/*release
Example output:
CentOS Linux release 7.5.1804 (Core) NAME="CentOS Linux" VERSION="7 (Core)" ID="centos" ID_LIKE="rhel fedora" VERSION_ID="7" PRETTY_NAME="CentOS Linux 7 (Core)" ANSI_COLOR="0;31" CPE_NAME="cpe:/o:centos:centos:7" HOME_URL="https://www.centos.org/" BUG_REPORT_URL="https://bugs.centos.org/" CENTOS_MANTISBT_PROJECT="CentOS-7" CENTOS_MANTISBT_PROJECT_VERSION="7" REDHAT_SUPPORT_PRODUCT="centos" REDHAT_SUPPORT_PRODUCT_VERSION="7" CentOS Linux release 7.5.1804 (Core) CentOS Linux release 7.5.1804 (Core)
Show which directory is consuming how much space
du -h --max-depth=1
Example output:
13M ./src 268K ./.unison 20K ./.ssh 0 ./synctest 0 ./.pki 56M ./openssl-1.1.0f 4.0K ./.config 68M ./.cache 4.0K ./.local 104M ./vendor 262M .