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Author Archives: Ahmed Tawfik
Delete the last line in a text file using sed
sed -i ‘$d’ hobba -i: to change the file itself, not copy contents to another file or something$d: delete the last linehobba: the file name
Tagged Bash, sed
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Insert a "new line" character in a text file using Bash
“echo -e “192.168.100.100\n192.168” >> hobba“ The ‘-e’ option does the magic, as it allows escape characters to be printed Source
Tagged Bash
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How to delete certain lines of text from a file in Bash using sed
“sed -i 1,+2d file_name” deletes starting from line ‘1’ and the next ‘2’ lines, i.e. deletes the first 3 lines
Tagged Bash, sed, Ubuntu
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Cleanup the SSH known_hosts file
“ssh-keygen -R [host] “ helpful especially in clusters
Tagged known_hosts, ssh, Ubuntu
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How to randomly change your MAC address on Ubuntu
“sudo apt-get install macchanger”“sudo macchanger -A eth0” where “eth0” is the network card you’d like to change its MAC. Note: You have to edit your connection in Network Manager and change the old MAC with the new one, or – … Continue reading
Tagged MAC, Ubuntu
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