Linux utils

Linux utils

Table of Contents

• 1. ======= useful command ==========
• 2. ======= git ==========
• 3. Remote develop
• 4. Utility tools
  • 4.1. Check Disk Space with NCurses Disk Usage
  • 4.2. Simple terminal UI for git commands

1. ======= useful command ==========

• fzf is a general-purpose command-line fuzzy finder

• find all files containing specific text

  • Basic

    grep -rnw '/path/to/somewhere/' -e 'pattern'

  • This will only search through those files which have .c or .h extensions:

    grep --include=\*.{c,h} -rnw '/path/to/somewhere/' -e "pattern"

  • This will exclude searching all the files ending with .o extension:

    grep --exclude=\*.o -rnw '/path/to/somewhere/' -e "pattern"

  • For directories it’s possible to exclude one or more directories using the --exclude-dir parameter. For example, this will exclude the dirs dir1/, dir2/ and all of them matching *.dst/:

    grep --exclude-dir={dir1,dir2,*.dst} -rnw '/path/to/somewhere/' -e "pattern"

• find and replace text by cmd

  perl -i -p -e 's{home/osboxes/vwtm_ut/}{"new sting"}g' ~/MicroSAR.patch

2. ======= git ==========

$ git clean -fd
git clean -f
git apply --whitespace=nowarn  ~/br_lge_extensions.patch
git reset --hard HEAD
git clone --recursive

3. Remote develop

• Use ssh without password

  $ssh-keygen -t rsa
  $ssh-copy-id -i ~/.ssh/id_rsa.pub {user}@{host}

• Download a single file from a remote ftp server to your machine:

  $sftp {user}@{host}:{remoteFileName} {localFileName}

• Upload a single file from your machine to a remote ftp server:

  $sftp {user}@{host}:{remote_dir} <<< $'put {local_file_path}'

• ssh and drobear for embedded target

  • cross compile drobear

  • copy dropbear dropbearkey

  • use dropbearkey to generate key

  • run drobear

4. Utility tools

4.1. Check Disk Space with NCurses Disk Usage

• Homepage: https://dev.yorhel.nl/ncdu

• Install

  apt-get install ncdu

• Run

  ncdu -x /

4.2. Simple terminal UI for git commands

• Homepage: https://github.com/jesseduffield/lazygit

nslookup google.com | sed -n '/Name:/{x;n;p;d;}; x' | awk '{print $2}' https://unix.stackexchange.com/questions/206886/print-previous-line-after-a-pattern-match-using-sed/206887#206887 https://stackoverflow.com/questions/13777387/check-for-ip-validity grep -oE '((1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\.){3}(1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])' messages https://stackoverflow.com/questions/14928573/sed-how-to-extract-ip-address-using-sed

https://www.putorius.net/ipset-iptables-rules-for-hostname.html https://confluence.jaytaala.com/display/TKB/Using+ipset+to+block+IP+addresses+-+firewall https://www.linuxjournal.com/content/advanced-firewall-configurations-ipset https://forum.openwrt.org/t/blocking-ips-based-on-their-domain-names-doesnt-work-for-all-my-ipsets/69790