There are 66 explicit "one another" commands / exhortations / imperatives / statements in the New Testament, 39 of which are unique. There are 32 positive and 7 negative. There are also other verses where "one another" is not present, but nevertheless they alludes to it.
POSITIVE COMMANDS
Love one another
John 13:34 — “A new commandment I give to you, that you love one another: just as I have loved you, you also are to love one another.”
John 15:12 — “This is my commandment, that you love one another as I have loved you.”
John 15:17 — “These things I command you, so that you will love one another.”
Romans 13:8 — “Owe no one anything, except to love each other, for the one who loves another has fulfilled the law.”
1 Thessalonians 4:9 — “Now concerning brotherly love you have no need for anyone to write to you, for you yourselves have been taught by God to love one another,”
1 Peter 1:22 — “Having purified your souls by your obedience to the truth for a sincere brotherly love, love one another earnestly from a pure heart,”
1 Peter 4:8 — “Above all, keep loving one another earnestly, since love covers a multitude of sins.”
1 John 3:11 — “For this is the message that you have heard from the beginning, that we should love one another.”
1 John 3:23 — “And this is his commandment, that we believe in the name of his Son Jesus Christ and love one another, just as he has commanded us.”
1 John 4:7 — “Beloved, let us love one another, for love is from God, and whoever loves has been born of God and knows God.”
1 John 4:11 — “Beloved, if God so loved us, we also ought to love one another.”
2 John 5 — “And now I ask you, dear lady—not as though I were writing you a new commandment, but the one we have had from the beginning—that we love one another.”
Encourage one another
1 Thessalonians 4:18 — “Therefore encourage one another with these words.”
1 Thessalonians 5:11 — “Therefore encourage one another and build one another up, just as you are doing.”
Hebrews 3:13 — “But exhort one another every day, as long as it is called ‘today,’ that none of you may be hardened by the deceitfulness of sin.”
Hebrews 10:25 — “not neglecting to meet together, as is the habit of some, but encouraging one another, and all the more as you see the Day drawing near.”
Greet one another with a holy kiss
Romans 16:16 — “Greet one another with a holy kiss. All the churches of Christ greet you.”
1 Corinthians 16:20 — “All the brothers send you greetings. Greet one another with a holy kiss.”
2 Corinthians 13:12 — “Greet one another with a holy kiss.”
1 Peter 5:14 — “Greet one another with the kiss of love. Peace to all of you who are in Christ.”
Live in harmony with one another
Romans 12:16 — “Live in harmony with one another. Do not be haughty, but associate with the lowly. Never be wise in your own sight.”
Romans 15:5 — “May the God of endurance and encouragement grant you to live in such harmony with one another, in accord with Christ Jesus,”
Serve one another
Galatians 5:13 — “For you were called to freedom, brothers. Only do not use your freedom as an opportunity for the flesh, but through love serve one another.”
1 Peter 4:10 — “As each has received a gift, use it to serve one another, as good stewards of God’s varied grace:”
Be compassionate to one another
Ephesians 4:32 — “Be kind to one another, tenderhearted, forgiving one another, as God in Christ forgave you.”
1 Peter 3:8 — “Finally, all of you, have unity of mind, sympathy, brotherly love, a tender heart, and a humble mind.”
Forgive one another
Ephesians 4:32 — “Be kind to one another, tenderhearted, forgiving one another, as God in Christ forgave you.”
Colossians 3:13 — “bearing with one another and, if one has a complaint against another, forgiving each other; as the Lord has forgiven you, so you also must forgive.”
Bear with one another
Ephesians 4:2 — “with all humility and gentleness, with patience, bearing with one another in love,”
Colossians 3:13 — “bearing with one another and, if one has a complaint against another, forgiving each other; as the Lord has forgiven you, so you also must forgive.”
Teach and admonish one another
Romans 15:14 — “I myself am satisfied about you, my brothers, that you yourselves are full of goodness, filled with all knowledge and able to instruct one another.”
Colossians 3:16 — “Let the word of Christ dwell in you richly, teaching and admonishing one another in all wisdom, singing psalms and hymns and spiritual songs, with thankfulness in your hearts to God.”
Be devoted to one another in love
Romans 12:10 — “Love one another with brotherly affection. Outdo one another in showing honor.”
Honor one another above yourselves
Romans 12:10 — “Love one another with brotherly affection. Outdo one another in showing honor.”
Accept one another
Romans 15:7 — “Therefore welcome one another as Christ has welcomed you, for the glory of God.”
Agree with one another
1 Corinthians 1:10 — “I appeal to you, brothers, by the name of our Lord Jesus Christ, that all of you agree, and that there be no divisions among you, but that you be united in the same mind and the same judgment.”
Have equal concern for one another
1 Corinthians 12:25 — “that there may be no division in the body, but that the members may have the same care for one another.”
Carry each other’s burdens
Galatians 6:2 — “Bear one another’s burdens, and so fulfill the law of Christ.”
Be kind to one another
Ephesians 4:32 — “Be kind to one another, tenderhearted, forgiving one another, as God in Christ forgave you.”
Submit to one another
Ephesians 5:21 — “submitting to one another out of reverence for Christ.”
Speak to one another with psalms, hymns, and songs from the Spirit
Ephesians 5:19 — “addressing one another in psalms and hymns and spiritual songs, singing and making melody to the Lord with your heart,”
Build each other up
1 Thessalonians 5:11 — “Therefore encourage one another and build one another up, just as you are doing.”
Spur one another on toward love and good deeds
Hebrews 10:24 — “And let us consider how to stir up one another to love and good works,”
Do not give up meeting together
Hebrews 10:25 — “not neglecting to meet together, as is the habit of some, but encouraging one another, and all the more as you see the Day drawing near.”
Confess your sins to each other
James 5:16 — “Therefore, confess your sins to one another and pray for one another, that you may be healed. The prayer of a righteous person has great power as it is working.”
Pray for each other
James 5:16 — “Therefore, confess your sins to one another and pray for one another, that you may be healed. The prayer of a righteous person has great power as it is working.”
Offer hospitality to one another
1 Peter 4:9 — “Show hospitality to one another without grumbling.”
Clothe yourselves with humility toward one another
1 Peter 5:5 — “Likewise, you who are younger, be subject to the elders. Clothe yourselves, all of you, with humility toward one another, for ‘God opposes the proud but gives grace to the humble.’”
Live in peace with each other
1 Thessalonians 5:13 — “and to esteem them very highly in love because of their work. Be at peace among yourselves.”
Show patience to one another
Ephesians 4:2 — “with all humility and gentleness, with patience, bearing with one another in love,”
Show gentleness to one another
Ephesians 4:2 — “with all humility and gentleness, with patience, bearing with one another in love,”
Be sympathetic to one another
1 Peter 3:8 — “Finally, all of you, have unity of mind, sympathy, brotherly love, a tender heart, and a humble mind.”
Have unity of mind
1 Peter 3:8 — “Finally, all of you, have unity of mind, sympathy, brotherly love, a tender heart, and a humble mind.”
Do good to one another
1 Thessalonians 5:15 — “See that no one repays anyone evil for evil, but always seek to do good to one another and to everyone.”
Use your gifts to serve one another
1 Peter 4:10 — “As each has received a gift, use it to serve one another, as good stewards of God’s varied grace:”
NEGATIVE COMMANDS
Do not grumble against one another
James 5:9 — “Do not grumble against one another, brothers, so that you may not be judged; behold, the Judge is standing at the door.”
Do not judge one another
Romans 14:13 — “Therefore let us not pass judgment on one another any longer, but rather decide never to put a stumbling block or hindrance in the way of a brother.”
Do not put any stumbling block or obstacle in the way of one another
Romans 14:13 — “Therefore let us not pass judgment on one another any longer, but rather decide never to put a stumbling block or hindrance in the way of a brother.”
Do not provoke and envy one another
Galatians 5:26 — “Let us not become conceited, provoking one another, envying one another.”
Do not slander one another
James 4:11 — “Do not speak evil against one another, brothers. The one who speaks against a brother or judges his brother, speaks evil against the law and judges the law. But if you judge the law, you are not a doer of the law but a judge.”
Do not lie to each other
Colossians 3:9 — “Do not lie to one another, seeing that you have put off the old self with its practices”
Do not deprive one another (marriage context)
1 Corinthians 7:5 — “Do not deprive one another, except perhaps by agreement for a limited time, that you may devote yourselves to prayer; but then come together again, so that Satan may not tempt you because of your lack of self-control.”