Posts published in “Linux”
The CentOS Project is a community-driven free software effort focused on delivering a robust open source ecosystem. For users, CentOS offers a consistent manageable platform that suits a wide variety of deployments. For open source communities, CentOS offers a solid, predictable base to build upon, along with extensive resources to build, test, release, and maintain their code. 1. Find Out Installed Package [[email protected] /]$ rpm -qa |lessplymouth-0.8.9-0.24.20140113.el7.centos.x86_64libsoup-2.48.1-3.el7.x86_64libaio-0.3.109-13.el7.x86_64dmidecode-2.12-9.el7.x86_64passwd-0.79-4.el7.x86_64bind-libs-lite-9.9.4-29.el7_2.2.x86_64sed-4.2.2-5.el7.x86_64grub2-2.02-0.34.el7.centos.x86_64libcom_err-1.42.9-7.el7.x86_64rsyslog-7.4.7-12.el7.x86_64biosdevname-0.6.2-1.el7.x86_64dracut-config-rescue-033-360.el7_2.x86_64libacl-2.2.51-12.el7.x86_64openssh-clients-6.6.1p1-23.el7_2.x86_64xe-guest-utilities-6.5.0-1432.x86_64libgcrypt-1.5.3-12.el7_1.1.x86_64libpcap-1.5.3-8.el7.x86_64cronie-1.4.11-14.el7.x86_64iwl6050-firmware-41.28.5.1-43.el7.noarchiwl4965-firmware-228.61.2.24-43.el7.noarchiwl3160-firmware-22.0.7.0-43.el7.noarchlibunistring-0.9.3-9.el7.x86_64iwl100-firmware-39.31.5.1-43.el7.noarchperl-parent-0.225-244.el7.noarchnewt-0.52.15-4.el7.x86_64perl-Pod-Escapes-1.04-286.el7.noarchgdbm-1.10-8.el7.x86_64perl-libs-5.16.3-286.el7.x86_64…….[[email protected]…
1. Basic Commands man ： manualls ：List Directory Contentspwd ：print working directorycd ：change directorymkdir ：Make directorycp ：Copymv ：Movefind and locate and whereiskill passwd ：Passwordmd5sum ：Compute and Check MD5 Message Digesthistory ：History (Event) Record。sudo ：(super user do)touch ：Update the access and modification times of each FILE to the current timechmod ：change file mode bitschown ：change file owner and groupapt ：Advanced Package…
1. Juniper Firewall find . -type f -size +10000 -exec ls -lh {} ; Sample output: [email protected]% find . -type f -size +10000 -exec ls -lh {} ; -rw-r–r– 1 930 929 134M Jan 5 17:34 ./cf/packages/junos-11.4R6.6-domestic-rw-r–r– 1 root wheel 139M Sep 8 2011 ./cf/var/log/junos-srxsme-11.2R2.4-domestic.tgz-rw-r—– 1 root wheel 4.9M Feb 11 17:12 ./cf/var/db/idpd/db/secdb_02.db-rw-r—– 1 root wheel …
Create a file:echo ‘This is a sekret’ >/tmp/msg.txt Export public key:openssl rsa -in ~/private.pem -out /tmp/public.pub -outform PEM -pubout Encrypt file with public key (anyone can have this key):openssl rsautl -encrypt -inkey /tmp/public.pub -pubin -in /tmp/msg.txt -out /tmp/file.enc Decrypt the file with private key (only you should have the private key):openssl rsautl -decrypt -inkey ~/private.pem -in /tmp/file.enc -out /tmp/decrypted.txt Check…