Tag: command
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Compare two Directories Using Diff
Compare directories using diff. diff -qr dirA dirB | sort
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Move small files to separate directory in one command
Loop files under a set weight to move it to a directory. for f in `find . -iname “*.JPG” -size -500k`; do mv ${f} small; done
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Check if a program (ex: Chrome) is installed
This command works in systems running apt . With dpkg you can list all packages installed and the output is filtered with grep. dpkg −l | grep chrome
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Ext3 format USB Drive on Linux
Format an usb drive from cli. With fdisk you can list existing partitions in the system. fdisk -l # -c option checks for bad sectors mkfs -t ext3 -c /dev/sde1
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What is the shell you are currently in ?
Simple command to find out what shell you are using. ps -ef | grep $$ | awk ‘{print $8}’
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List Files in RPM Installed Package
If you want to know what files a rpm package copied to your system, you can find it out executing the following command: rpm -ql foo
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Find and delete
Find files and directories containning your search terms, and delete them witout confirmation and recursively. No matter if they are not empty. find . -name “search_terms” -exec rm -rf {} \;
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Download a Web Site with wget
Wget is a tool to download websites from cli. How to download an entire site could be acomplished with the following example: wget \ –recursive \ –no-clobber \ –page-requisites \ –html-extension \ –convert-links \ –restrict-file-names=windows \ –domains demosite.org \ –no-parent \ www.demosite.org/html/
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Split and join files
How to split a file in chunks and how to put them back together. ### SPLIT LONG: split –bytes=5m –suffix-length=2 –numeric-suffixes image.iso image.iso.part_ split –verbose –bytes=5m –suffix-length=2 –numeric-suffixes image.iso image.iso.part_ ### SPLIT SHORT: split -b 5m -a 2 -d image.iso image.iso.part_ split –verbose -b 5m -a 2 -d image.iso image.iso.part_ ### RESTORE cat image.iso.part_* >…
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Remove RSA key for ssh authorized hosts file
How to remove an ssh host by name or ip from your authorized hosts file. ssh-keygen -R {server.example.com} ssh-keygen -R {ssh.server.ip.address}