number – TRUEANGLE

What if a user or group name is a string of digits?

root>useradd 1991 root>mkdir /home/1991 root>chown 1991.1991 /home/1991/ root>passwd 1991 Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully root>login 1991 Password: The programs included with the Debian GNU/Linux system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Debian GNU/Linux comes with ABSOLUTELY …

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Tinkering with an Armstrong number finding program function

$./app Sign detection [1] Power of two [2] Counting No. of bits set [3] Set or clear bits without branching[4] Find maximum value[5] Finding least common multiple[6] Finding the greatest commom divisor[7] Finding if a number is an Armstrong number or not[8] 8 Enter a positive integer: 153 153 is an Armstrong number $./app Sign …

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grep .. -m .. stop reading a file…

-m Stop reading a file after NUM matching lines. $grep -m 1 wc wcwidth.c #include $grep -m 2 wc wcwidth.c #include wchar_t cr; $grep -m 3 wc wcwidth.c #include wchar_t cr; value=wcwidth(cr); $grep -m 4 wc wcwidth.c #include wchar_t cr; value=wcwidth(cr); $grep -m 0 wc wcwidth.c $ scripts/makelst – 338 identical 19: t1=`$3 –syms $1 …

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